Dmitry Sinkevich

Kershaw Concierge Knife Review

Dmitry Sinkevich and Kershaw are on a roll. Following the success of the critically-acclaimed Atmos, they’re leaping back into service with the Concierge – A slightly larger pocket knife boasting the same sci-fi elegance and everyday accessibility.

With an out-the-door cost of $38 at BladeHQ, the Kershaw Concierge is a compelling entry point into the mind of one of the world’s premier knife designers. Its dapper handle houses a deceptively simple blade, ready to trim the foil from your morning champagne or cut the rind from your brie at brunch. I spent a few weeks chauffeuring this knife between work and play, thanks to the generosity of the folks at Kershaw. Here’s what I’ve learned over my stay with the Concierge.

General Dimensions and Blade Details

The Concierge boasts a contoured, upswept blade some 3.25-inches in length. The stock is rather narrow across the shoulders (0.11-inches), with a hollow grind outfitted in a dapper gray titanium nitride coating. Beneath this lies Kershaw’s ever-present 8Cr13MoV steel.

Now, I won’t go too far down the steel rabbit hole, since the similarly equipped Atmos has proven to be a capable worker. I’d still like to see something like 154CM or 14C28N on Kershaw’s budget models, but at least their 8Cr runs better than most.

The rest of the Concierge’s 7.25-inches is comprised of nicely crowned G-10, within which lies a stainless steel linerlock and KVT ball bearing system. Think about that for a second – Up until a few years ago, this would almost certainly have been running on Teflon or (if we were lucky) phosphor bronze washers. As it is, this newly affordable mechanism is sandwiched in a 0.55-inch thick handle, bringing the knife’s total weight to 4.3-ounces.

Now that we’ve covered the stats, let’s take a minute to talk about the knife’s real-world usage. The long, gentle curve of the blade is well suited for daily tasks. Its hollow grind had no trouble dealing with my typical mediums – apples, onions, cardboard, envelopes, and plastic wrap. The knife came sharp from the factory, and I’ve stropped it back to life with no issues. We’ll cover the details of the ergonomics in a moment, but I’m generally impressed with the everyday ability of the Concierge.

Handle, Ergonomics, and Pocket Clip

This is a knife that’s smooth all over – Like a tactical otter, or a slippery maitre d’. The subtle swells and arcs of the Concierge’s handle are really something to appreciate, especially when examined up close. Dmitry Sinkevich is known for his sleek, futuristic designs, and his style is in full force here.

The texturing of the G-10 handles is subtle and smooth. The large, dimpled pivot screws provide an interesting focal point for eye and thumb alike, and the chamfered steel liners are easy on the palm. I appreciate the jimping on the long backspacer, as well. Beyond its ergonomic appeal, it’s another point of visual grace in the knife’s overall design.

One of the more unique aspects of the Concierge lies in its recessed pocket clip. This single tongue of steel dips below level of the rest of the handle, thanks to a pair of unique cutouts. The tip peeks just above the horizon of the surrounding G-10, allowing users to slip the knife in and out of the pocket with ease. It takes a bit of practice, but I’m a big fan of the concept here. A recessed clip translates into a reduction of hot-spots in the hand, and Mr. Sinkevich has nailed its implementation. True, this means you’re left with a non-reversible clip. But for the majority of the knife-buying audience, this should be a hit.

Deployment and Lockup

The Concierge employs some of the best fit and finishing I’ve seen on a sub-$100 blade. But once we transition into the functional realm, several budgetary bugaboos rear their ugly heads.

Let’s start with the positives. The opening action is strong, thanks to a solidly designed detent. The blade’s long flipper tab is well-ground and smooth, preferring a button-style press to the old light-switch flick. As mentioned earlier, it’s great to see a KVT bearing system at a price point formerly reserved for Teflon or phosphor bronze washers.

So, deployment is a breeze. Stowage, however, is an entirely different story. My particular test model came with some pretty significant lock stick. Even after a thorough breakdown, cleaning, and repeated application of graphite and Sharpie, it’s still not a terribly smooth process. Combine this with the rather thin (though well-chamfered) lock bar, and you’ve got a recipe for tenderized thumb meat.

This removes much of the fidget-factor that made the Atmos so appealing. I’ve spent a decent amount of time messing around with the Concierge, and the lockbar hang-up isn’t as bad as it used to be. But, at least on my test model, the stickiness took some of the fun out of the experience. It’s a shame, especially given the KVT bearings and the perfect position of the flipper tab.

There’s also an odd note of metallic chatter upon closure, most noticeable between the disengagement of the lock and the blade tang hopping up over the detent. This is a minor issue, and I’m not concerned about the mechanical soundness of the lock system. But, it’s a small annoyance not present on the cheaper Atmos.

Kershaw Concierge Review – Final Thoughts

By this point, my preference should be clear – I ditched the $150 ZT0450 in favor of the Atmos, and the Concierge (while certainly a nice knife) isn’t going to kick its smaller cousin out of the collection. This is largely due to personal aesthetic (I prefer the uncoated blade), but the lock stick comes into play as well.

Minor production hang-ups aside, I still think this is an excellent knife. The recessed pocket clip and upscale aesthetic alone are enough to warrant the price of entry. I’d advise potential purchasers to adopt the try-before-you-buy attitude, in order to avoid picking up a model with the same lock stick issue I encountered. But, this is another strong collaboration between Kershaw and Dmitry Sinkevich. It’s a solid option at a respectable price, especially if the Atmos is too small for your palm.

Kershaw Concierge Pocketknife (4020); 8Cr13MoV Modified Drop Point Blade; Gray Titanium Carbo-Nitride Coating; Black G10 Handle; KVT Ball-Bearing Manual Open; Liner Lock; Recessed Pocketclip; 4.3 oz

List Price: $33.00

Price: $32.98

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Price Disclaimer

Editor: I recommend purchasing the Kershaw Concierge at Amazon or BladeHQ. Please consider that buying anything through any of the links on this website helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.

Custom Knife Factory Decepticon 2 Review

by Andrew Gene Leave a Comment

Ever since the explosion of the Shirogorov brother’s knives, there has been an increased interest in what is being produced in Russia. This has been pushed further along by a growing amount of breakout designers, most notably Dmitry Sinkevich. Sinkevich, a long time Shirogorov collaborator, has also worked extensively with KAI USA. The outcome was a high end knife in the Limited Edition 0454, mid range knives in the 0452CF and 0450 as well as budget conscious models like the Kershaw Nura.

Buy the CFK Decepticon 2 at BladeHQ

The KAI collaboration has resulted in wider exposure and greater accessibility to Russian designs outside of Shirogorov, who were previously the go to brand. The issue with enjoying a Shirogorov has always been the initial price point and/or inflated after market cost, partly due to available knives and a near monopoly on their distribution in North America. While somewhat inaccessible, the popularity of Shirogorov has opened up a wider market for other Russian designers and manufacturers. At the same time, the KAI collaboration put similar designs into more peoples hands.

Enter Custom Knife Factory. Custom Knife Factory is a relatively young manufacturer headed by Mikhail “Mike” Kulygin. The aim of the brand is to work with some of the “newer” talent on the Russian Knife scene. I quote ‘newer’ as some of these designer/makers have been around for quite some time. It’s just that they are only coming into our popular North American knife culture as of late. One such designer is Alexey Konygin the creative mind and craftsman behind the knife in this review. I personally have been very interested in Alexey’s designs after seeing a video of a custom Decepticon “1” on YouTube in 2012. Impressively 2011 is when the designer came onto the scene, hitting the ground running with his original offerings. Three years and a new iteration later, I’m very happy to present a review of the Konygin/CKF Decepticon 2.

General Dimensions and Blade Details

The Decepticon 2 is a large folder, produced in a limited run of 300 natural-finish titanium handle versions. The over all dimensions are 9.69” with a substantial 4.33” blade and weight of 6.06 oz. It’s difficult to perceive the size of the knife based on the numbers alone, it’s best to hold one to get the idea. The designer has stated a liking for big knives and this certainly fits the bill. Despite its size, it actually feels quite light in hand due to the handle’s structure.

The blade is made from Crucible’s S35VN, a widely used powder metal “super steel”. It is considered an upgrade to S30V through the addition of Niobium and has pretty much taken its predecessors place in mid to high end folders. Overall, this stainless has great edge retention and toughness, yet is still fairly easy to maintain.

The profile is a stylish modified drop point. A high flat grind adequately reduces the .156” stock at which point it receives a secondary edge bevel. The spine has a slight concave curve for thumb placement which changes direction mid-spine, arcing downward to meet the belly at a fine tip. The upper portion of the blade is detailed with a stylized thumb hole that is accented by a deep swedge grind and line milled into the upper corner of the opening. Visually, the line here continues up to a small thumb ramp that has a row of fine jimping. The blade has a light stone wash finish and is kept clean of markings except for text indicating the steel type. To help with sharpening, there is a good sized choil allowing you to work the edge right to the heel.

Handle, Ergonomics, and Pocket Clip

The handle is constructed of sculpted slabs that stack together integrating to define the Decepticon’s distinct aesthetic. The two inner parts of the frame include all of the key mechanical components, like the lock and a channel for the stop pin. The outer scales add more width for a full feeling grip while their cutouts create counterpoints with the inner, latticed frame. At each end, the layers shear off at contrasting angles adding another interesting aspect to the multi-faceted design. Although the shapes appear to have several hard angles, the overall profile, coupled with some nice chamfering makes for a surprisingly comfortable grip. The only exception to this for me, is the end of the clip which can feel sharp if you hit it the wrong way.

While on the topic of the clip, it works well with a good amount of tension. It blends into the rest of the design and has been nicely machined. As another feature, the partial back-spacer raises away from the frame creating a spot for a lanyard. The back-spacer is marked with the knife’s unique serial number, this one being #67 of 300. The CKF logo also appears etched on one of the exposed surfaces of the liner.

Deployment and Lockup

While there is the thumb hole, the Decepticon 2’s main deployment method is its flipper. As with most details of the knife it is also embellished with a cutout. Functionally it works well, snapping the substantial blade into place with a push or pull, equally well.

The lock up is very solid with good tension allowing it to seat and disengage easily. The end of the lock arm has a steel insert with a similar configuration to Zero Tolerance’s knives in that the part also includes the detent. To help comfortably unlock the knife and to provide easier access to the lock arm, the inside of the scales are chamfered. The mechanism travels on thrust bearings for smoothness and lateral stability. Everything is held in place by an over-sized custom pivot.

Custom Knife Factory Decepticon 2 Review – Final Thoughts

Although individual taste will vary, it is undeniable that the Decepticon designs are unique. If looking at it objectively, all of the key functional components are there. The blade is useful, handle comfortable, lock strong and materials premium. More impressively the design does this while visually setting itself apart from anything else currently out there.

I think that the name might be a little confusing when approaching this design because of it’s association to the movie franchise. Michael Bay might narrow the market appeal. As a note, Konygin named the knife after designing it and has stated that it was not inspired by the movies…

Personally I really enjoy this iteration and production of the Decepticon. It has achieved a delicate balance of generous embellishment without looking gaudy or ostentatious. I would equate this to the approach of creating shapes and lines by removing stock, instead of piling on extra details, like moku-ti or engraving. It clearly shows off a creative, innovative liner lock assembly with an intelligent utilization of modern methods and materials.

I especially appreciate how well thought out the lines and shapes are on this design. Alexey Konygin has paid great attention to the interaction of all the elements when the knife is both open and closed. From a manufacturing perspective the knife is very well made with a top end fit and finish. I’m looking forward to seeing more CKF collaborations and Konygin designs in the future. I’m sure that these collaborations will help quench the healthy thirst for more Russian designs.

CKF Decepticon 2
From: BladeHQ

Editor: I recommend purchasing the Custom Knife Factory Decepticon 2 at BladeHQ. The knife is no longer in production, but BladeHQ offers plenty of CKF knives, including the Decepticon 4. Please consider that buying anything through any of the links on this website, including Amazon.com, helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.

Photo Credits: Andrew Gene

Rockstead RYO Review

by Andrew Gene 2 Comments

The RYO is the latest folder from Rockstead, coming after their futuristic SHUN collaboration that was the work of Belorussian designer Dmitry Sinkevich. The SHUN was a tangent from the company’s previous aesthetic sensibilities, carrying much more futuristic lines in a larger form factor. Rockstead’s unmistakable mirrored blade grind and stylized fuller aside, the knife was definitely something more akin to other Sinkevich designs like the ZT 0452CF or his Shirogorov collaborations.

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The RYO design is a redirect back toward Rockstead’s other models, with a distinctly Japanese look that draws inspiration from an iconic friction folder. While most models reflect sword patterns, the RYO references the Higonokami (Higo for short) resulting in something similar to a modified wharncliffe, in Western cutlery terms. The blade shape is paired with an undulating handle texture reminiscent of waves, or in this case maybe black raku ceramics or “Japan Black” lacquerware. The name RYO translates to “good”. From my research it can be used to describe something of superior quality or character and is also used as a persons name.

As a side note, it might have been appropriate to call the RYO the HIGO however, Rockstead already has a knife named that. Although claiming the name, the model carries it in spirit only, and does not share a similarity in blade style.

General Dimensions and Blade Details

Although the Rockstead RYO has a foot in the past, it’s clearly a modern knife showing off a finished product that is only possible through a combination of modern machining and the latest high-tech materials. The over-all length measures 7.716” (196mm) with a 3.125″ (79mm) blade, and a weight of 4.37 oz (124 g).

New to the folding knife collection, the RYO has a “concealable” clip design. We are also seeing a titanium handle, rather than the Duraluminum that’s has been used in the past. This isn’t that surprising as most of the newer, all metal handles (as seen in the SAI and SHUN) are full Titanium.

The 3.15” (80 mm) blade is made from one of Hitachi Metal’s flagship cutlery steels, ZDP-189. ZDP-189 boasts rather extreme specifications with a chromium content at 20%, nearly double the 10.5% needed to consider it a stainless, and a carbon content of 3%, just over four times the 0.7% needed to be classified as “high carbon”. The full specifications are as follows:

Carbon	Chromium	Molybdenum	Tungsten	Vanadium
3.00	20.00	1.50	1.50	0.10

Such impressive specifications are reached through a powder metal technology which helps to avoid the uneven (segregated) carbide micro-structure caused by cooling steel into a traditional ingot. During the process, molten alloy is pushed through a nozzle where it meets a high pressure stream of air. At contact with the compressed air, the molten metal rapidly solidifies creating a tiny, near-to segregation free, sphere-like particle. Because the cooling is so fast, the component elements are fixed in place with a more even micro-structure. The powdered batch is then mixed and sealed into inert-environment containers to avoid unwanted reactions. Finally it’s Hot Isostatically Pressed (HIP), trapping all of the ideal properties, evenly into place.

With such generous levels of elements that make for a high-performance steel, ZDP-189 is able to reach an incredible finished hardness and take an equally impressive edge. Rockstead measures each piece and the small dimple left from measurement is proudly displayed on the blades ricasso. The hardness of this particular RYO measures 67 RC.

While seemingly the end goal for a steel, the result does compromise other desirable attributes. The first is accessibility. Using ZDP-189 and finishing it to these standards increases cost. Secondly, such a high hardness makes the steel more brittle since it lacks any real ductility, limiting application to lighter duties.

This steel is chosen to support the grind, and as on all other Rockstead knives, the grind is nothing short of amazing. Rockstead defines the convex, zero geometry as Hon-zukuri which is traditionally reserved to describe sword patterns. The meaning loosely translates to “base style” and is Rockstead’s go to configuration. On other models they also offer flat grinds that include a secondary bevel as seen on the TEI-S DLC.

I’ve had the opportunity to handle three Rockstead knives and the mirrored finish is perfectly executed on all, only showing distortion from the curvature of the convex shape or on the compound angles that radius the belly of the blades. Because the mirrored finish runs right to the edge, the cutting performance is outstanding with a sharpness that seems to pass effortlessly while in use. This is partly because the blades are pretty much perfectly symmetrical and there isn’t any tooth to the edge that can catch on the material you’re cutting. While pretty legendary for a knife; as mentioned before the edge is fragile and it will micro-chip under normal use. This is where questions of practicality comes into play. Your flawless blade can be maintained – if you use Rockstead’s paid sharpening service. Otherwise you can do the job yourself at the expense of the perfect finishing.

As for the profile, the Higonokami-like pattern is very useful. The slightly curved edge is excellent for everyday tasks while the tip excels at fine work over something like a drop-point. For detailing Rockstead’s stylized fuller gives the blade an animated, vigilant stare while the media blasted flats provide a contrast that intensifies the polished grind.

Handle, Ergonomics, and Pocket Clip

The fully sculpted “3D machined” handle of the knife is very comfortable. The inner edge has a series of shallow finger grooves that conform to your hand nicely. At 4.566” in length you get a full grip for average sized hands. The area of use is extended by a deep choil that meets a curve toward the front of the handle, allowing you to choke up for more control. Added grip and tactile feedback is helped along by jimping on the clip’s back and a double row of jimping along the handle’s spine that’s continued by a run onto the blade’s thumb pad. There’s also a small swatch on the choil so you know exactly where you’re at when your finger is near the heel of the edge. Jimping mission accomplished.

The cross cut ridges add a significant dress factor to the polished handle, catching the light and defining the overall form. As you hold the knife in your hand, highlights roll across the surface giving the grip a jewel-like appearance that’s amplified by the dark, glassy DLC (Diamond Like Carbon) coating. The same reflective qualities that give the handle its presence also create some challenges. With so many surfaces and such a tricky polish, any small marks or areas of unevenness during the process tend to be exaggerated by the DLC and under very close inspection, some are visible. This can only really be observed when the knife is spotlessly cleaned up and under good light as was the case when producing the video overview. Also, it’s an epic finger print magnet. From one perspective I’d like to see the handle as immaculately rendered as the blade and from the other I appreciate the ambition.

An area where I definitely feel the handle could be improved however, is weight. Milled out pockets on the inner scales could trim fat from the 4.37 oz. While this won’t bother some and others will equate weight with value, I prefer a lighter folder, and sub 4 oz would feel better with this smaller form factor.

For deployment there are two ambidextrous thumb-studs. While polished, they have a conical shape that narrows at the base, sit high and are exposed by a handle cut-out so you can easily and repeatably use them.

When opened the blade is held solidly by a button lock. Most button locks I’ve handled have a small tick of movement that eventually settles in, and this seems to be the case with the RYO. As of now, after handling the knife for some time, the lock-up feels totally solid and without play. Although seating confidently under significant spring tension, the action is smooth and without stickiness. When unlocking, the polished button head feels good under your thumb.

Normally, a button lock’s plunger serves double duty and is also used to hold the blade closed. In many cases the tension in the closed position is light allowing the blade to more easily fall out of the stowed position than something like a liner or frame lock. With the RYO, Rockstead has smartly added a separate detent that holds the blade closed, so the tension can be dialed in independently. As a small gripe, I’m not overly fond of the high pitch click the knife makes when overcoming the detent, but in a luxury item I tend to split hairs. Regardless of any criticism, the sum of parts of this button lock equals one the nicest I’ve handled to date.

Rounding out the details there is what Rockstead calls their “concealable” pocket clip. This is primarily an ergonomic feature so you don’t feel the clip when cutting. The integration is nicely executed and works visually when the knife is both open and closed. To reveal the clip, you manually push on its end which sits slightly proud when hidden. Although the small tab is visible, you don’t really feel it under normal use. The clip sits on a larger base that supports it, for a smooth yet robust feeling action. Because the clip is oriented to the back of the handle, its attachment point is best at your pocket seam (as opposed to along the opening) and works better with thinner fabrics. The fact that the clip is machined rather than stamped and bent, makes for a strong tension and, because of the orientation, the knife can twist to the side with thicker materials. I guess this isn’t really a jogging pants type of knife anyway.

Apparently this concealable clip design infringes on a patent filed by knife maker Joseph Caswell, who has a design called the EDX with a clip that automatically changes position with the action of opening and closing the blade. As such Rockstead has had to license in order to stay above board. As an additional carry option there is a lanyard hole that is discretely milled into the pommel.

Rockstead RYO Review – Final Thoughts

From the material choices through to the finished functional design, Rockstead personifies the ethic of Japanese bladesmithing. An approach where there is a thirst for the best technology and materials while still respectfully integrating knowledge and concepts from the past in balanced measure. Rockstead’s ability to harmoniously combine historic patterns with contemporary features is unique to the brand. While costly, these knives are truly distinct, no small feat in a market that is increasingly more saturated. The RYO is certainly “good”.

Rockstead Higo
From: BladeHQ

Editor: I recommend purchasing the Rockstead RYO at BladeHQ. Please consider that buying anything through any of the links on this website, including Amazon.com, helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.

It is with tremendous pride that I get to share the news that Andrew Gene has allowed me to republish his articles from EdgeObserver here on BladeReviews. We will be rolling them out slowly over the coming months.

Those who have pursued their passion for knives on the internet for any extended period of time won’t need an introduction to Andrew, but for the uninitiated he is the polymath behind the EdgeObserver, a website that celebrated knives by showcasing them with gorgeous high definition video and photography. Andrew retired the EdgeObserver earlier this year, but some of his articles and photography will get to live on here. Check out his website and follow him on Instagram to stay on top of his latest projects.

Kershaw Atmos Review

by Josh Wussow Leave a Comment

Look – We all try to stick to a budget. But as knife enthusiasts, we sometimes have a bit more difficulty than most. This is one of the reasons I’ve gravitated toward the shallow end of the blade pool. So, when the Kershaw Atmos made a big splash with some fellow reviewers, I decided to see what all the fuss was about.

Buy the Kershaw Atmos at BladeHQ

General Dimensions and Blade Details

Let’s get the obvious comparison out of the way – Yes, the Atmos looks like a budget version of the Zero Tolerance 0450. And it should, considering they share a common designer in the great Dmitry Sinkevich. But, as you’ll see in the comparison photos, the Atmos is between 10 and 15-percent smaller in most of its physical dimensions. We’ll come back to this comparison later, but let’s focus on the Kershaw for now.

The centerpiece of the Atmos is its 3-inch drop-point blade, wearing a satin finish over its hollow grind and upper swedge. It’s been crafted from a 0.10-inch thick piece of Chinese 8Cr13MoV steel, which is sure to illicit groans from about 90-percent of the audience. Look – I don’t like this steel any more than you do. But, hang with me for a while, and maybe you’ll learn to look past it.

Overall, the Atmos measures 6.9-inches, nearly four of which make up the G-10 handle. There’s a stainless steel insert on the clip side, housing the linerlock mechanism. Kershaw has included attractive carbon-fiber overlays on each handle slab (read: stickers), which somehow manage to avoid looking tacky on this budget-minded blade. I’m not usually a huge carbon fiber fan, but the added layer brings the handle width to a pleasing 0.43-inches. Weight-wise, the Atmos tips the scales at just 2-ounces. For those of you keeping track, that’s within 0.1-ounces of the Kershaw Fraxion, despite housing a bigger blade and far superior design.

Handle, Ergonomics, and Pocket Clip

Dmitry Sinkevich is a master of form, and the Atmos represents the very best aspects of his work. It cuts an attractive figure, with futuristic angles that somehow meld perfectly into my medium/large hand. It also manages to be more comfortable, practical, and carriable than its premium cousin.

Don’t believe me? Let’s break it down point by point. First, the grip. While I always adored the 0450 from an aesthetic standpoint, its hand-feel is always a bit of a disappointment. This is partially due to personal preference, since I find slab-sided titanium blades to be more difficult to grip. I’ll take G-10, Micarta, or even Grivory any day of the week. The Atmos’ G-10 and carbon fiber overlay provide solid purchase, even with damp or greasy hands. The jimping along the finger-facing portion of the flipper tab is a thoughtful touch, as well. While some may find it to be a bit aggressive, its extra friction really holds my index finger in place. Though we’re used to seeing flipper tabs pull double duty as blade guards, the setup on the Atmos feels extra secure.

Next, let’s cover the practicality of this blade. The hollow grind glides through onions, carrots, and cardboard with genuine ease. Yes, 8Cr13MoV is nowhere near as good as the 0450’s S35VN. But the grind, in conjunction with the thinness of the Atmos’ blade stock, allows it to cut far longer than you’d expect from a cheap Chinese steel. The ZT, on the other hand, features a saber grind with a tendency to split foods rather than slice.

We’ll wrap this portion of the review with a discussion of carriability. When I say that the Atmos is easier to carry than the 0450, I’m really making two different statements. On the scientific side, this is simply a more pocketable design. It weighs almost an ounce less than the titanium model (2-ounces vs. 2.9), and the deep-carry pocket clip is far superior to the semi-high ride affair on the ZT. It also manages to produce less of a hotspot under firm grip.

On the more personal side, I’ve found this to be an easier knife to use. Like, if someone asks me to cut a plastic tie-wire from a segment of steel grating, I’ll always hesitate before pulling out the 0450. It’s an attractive, expensive knife, and I find it difficult to shake the fear of dinging it up. But with the Atmos? Hell, it’s only $30. What do I care if the blade accidentally knocks up against a rock or piece of structural steel? It’s a more capable cutter, without the nagging pocket-jewelry connotation. Sure, it’s not the most hard-use tool on the table, but let’s be honest – Neither is the 0450.

Deployment and Lockup

The Kershaw Atmos is a fidgeter’s dream. I’ve spent more time playing with this knife than any other in my collection. Even the ZT0450 pales in comparison when it comes to fidget factor. There’s just something about the Atmos’ deployment – The snikt/clack that lands pleasantly on the ear.

The linerlock itself lands at a solid 40-50% lockup, with the blade flying through its arc after a firm press on the flipper tab. Kershaw has dialed in the detent to the point that it’s actually rather difficult to cause a misfire. Here’s a breakdown shot of the Atmos, showing the internal hardware responsible for its excellent action.

As you can see, Kershaw has included both metal washers and captive bearings. The setup works well, though the arrangement is a little strange. On the show side, the bearing is sandwiched between the washer and blade. On the clip side, the bearing rests between the washer and the linerlock steel. This is something you’ll need to remember during reassembly, if you want the blade to remain centered.

And you will need to take this blade down. See that deep hook on the blade tang? After household chores and a weekend of camping, gunk started to accumulate in its inner recesses. Thankfully, the simple screws and D-shaped pivot make disassembly a relatively routine affair. As mentioned, just be sure you’re putting the washers and bearings back in the proper order.

Even with proper oiling, however, the blade’s swing isn’t completely utterly smooth. I still encountered a bit of rolling friction when working it back and forth manually, but this is more than covered by the strength of its detent. When firing with the flipper, you’ll never notice.

Kershaw Atmos Review – Final Thoughts

Take a deep breath, fellow knife nerds. I have a confession to make: The 0450 is on its way out of my collection, while the Atmos is staying for the foreseeable future. It’s not a question of cost, since the ZT was provided to me for a previous review. Rather, it’s an issue of usability. Yes, the 0450 is fun. Its fit, finish, materials, and design place it in the pantheon of great EDC knives. But, for all of the reasons discussed above, I find myself drawn to the down-to-earth usability of the Atmos.

That isn’t to say the Kershaw is perfect, however. I’d love to see an upgraded version, maybe with 154CM, 14C28N, or another budget-friendly steel. Dmitry Sinkevich has come up with a world-class design here, and it deserves world-class materials. But, with an entry price of just $30, this is one of the best budget EDCs on the market.

Kershaw Atmos Folding Pocketknife (4037); 3-in. 8Cr13MoV Stainless Steel Drop Point Blade; Black G10 Handle with Carbon Fiber; Inset Liner Lock; KVT Manual Open; Reversible Deep-Carry Pocketclip; 1 oz

List Price: $28.95

Price: $28.93

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Price Disclaimer

I recommend purchasing the Kershaw Atmos at Amazon or BladeHQ. Please consider that buying anything through any of the links on this website helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.

UPDATE: Kershaw has chimed in on the Atmos’ use of carbon fiber. Here’s what they had to say: “The one thing is that the carbon fiber on the handle is not a ‘sticker’. It is actually an integral part of the G10 handle material. For this knife, when they are making the G10 (which is an epoxy-fiber material), they make it by layering sheets of fiber with epoxy…but in this case, the top is composed of two thin layers of carbon fiber. So rather than being stickered on, the carbon fiber is part of the handle—just like all the other fiber layers in the material. The black G10 below is exposed when we machine the contours of the handle. There’s no way the carbon fiber would peel off as a sticker might.”

Kershaw also takes issue with the idea that 8Cr13MoV is a “groaner of a steel.” As their representative pointed out, Blade Magazine/KnifeForums has singled the company out as having attained the best heat treatment for this particular metal. I stand by my desire to see the Atmos in something a bit higher-end, but it’s good to know that they’re getting the most mileage out of ol’ 8Cr.

Zero Tolerance 0450CF Review

by Dan Jackson 16 Comments

I don’t know about you, but sometimes I lust after knives for months, or even years, before pulling the trigger. That was the case with this Zero Tolerance 0450CF. The original 0450 was cool, but the carbon fiber version put me over the top. It’s a little lighter and sleeker, and the choice of green anodized accents isn’t something you see on a lot of knives. I decided I wanted one, but could never find a decent deal on it.

Buy the ZT 0450CF at BladeHQ

Fast forward a couple years later, and I received a trade offer that included this 0450CF. Right on. I immediately responded back that I was interested, and a few days later the knife was at my doorstep.

By way of a more formal introduction, the 0450 series is a riff on the original Dimitry Sinkevich designed 0454CF that I reviewed back in 2014. Chad McBroom reviewed the mass marketed 0452CF and Ben reviewed the shrunken down full titanium 0450. I’ve got the ultra light 0450CF for your consideration today.

General Dimensions and Blade Details

The 0450CF has an over all length of 7.375″, a 3.25″ blade, and weighs a mere 2.45 ounces. Like all Zero Tolerance knives, the 0450CF is made in the USA.

The 0450 and the 0450CF are reactions to the knife market. Zero Tolerance is know for large overbuilt knives, but they received feedback that everyone didn’t want to carry around a big honking pocket knife. So the 0450 hit the scene, and then this 0450CF took that even further by replacing the titanium show side handle with carbon fiber. This shaved over almost half an ounce off the already lightweight 0450. This, my friends, makes for an ideal EDC knife in my book.

The 0450CF shares the same low slung blade that made us all fall in love with the 0454CF when it hit the scene. It’s a long, sleek, modified drop point blade, featuring a little belly and plenty of tip. The knife has a high flat grind and a decorative swedge. The blade has been given a semi-glossy black DLC coating. The edge has been uniformly applied, and there is a sharpening choil so you can easily sharpen this blade from tip to heel.

ZT opted for S35VN for the blade steel. Regulars to the site or high end knives need no introduction to S35VN. It’s a high performance stainless steel from Crucible designed specificaly for pocket knives with the help of Chris Reeve. It’s an excellent all round blade steel and a good choice for small pocket knives like this as it offers a good balance of edge retention, toughness, and ease of sharpening. I like S35VN generally, and they did a great job with the heat treat on this 0450CF. As always if you want to dive deeper into blade steel check out our steel section for all sorts of additional info.

Practically speaking this little 0450CF is a capable cutter. The blade shape is perfect for getting under envelopes, breaking down boxes, cutting fruit, and performing all the little odd ball chores I require of my EDC knives. That said, I must agree with Ben that this knife is not the best slicer. The partial flat grind binds up in material. While it cuts, it’s no Alox Cadet. This is probably my biggest gripe with the knife.

The S35VN blade has held up great, and so has the Diamond-Like Carbon (DLC) coating. DLC coatings are among the best money can buy, and unless you scrape this knife on concrete or metal it will hold up well.

Handle, Ergonomics, and Pocket Clip

The handle of the 0450CF is a solid piece of carbon fiber on the show side, and a black DLC coated titantium framelock on the reverse. The knife is held together with two green aluminum standoffs and an oversized pivot. Construction is simple yet elegant. All the hardware is black save for the green anodized standoffs. The fit and finish is exceptional. The screws are all the right length, the parts line up perfectly, and the finish work is excellent. The carbon fiber is lightly textured, and shimmers slightly in the light. This handle has been beautifully done.

The 0450CF is a small knife, but it doesn’t compromise in the ergonomics department. Dimitry’s design is simple and it should work well for most people. I take an “XL” size glove and have no problem getting a full four finger grip on this knife.

There is a short row of jimping on the spine that provides you with a little traction and something to index your thumb on. Beyond that there is not much in the way of texture. That’s fine by me as I don’t think this knife needs aggressive texturing. It works well as is.

The pocket clip is a standard parkerized black spoon style pocket clip. It’s relatively discreet and unobtrusive. While it’s not a true deep carry clip, it buries the majority of the knife in your pocket and keeps the 0450CF tucked away. The clip is swappable for right or left side tip up carry. A deep carry clip would have been nice.

I have carried this knife quite a bit. The 0450CF is a knife that you forget you are carrying. At just under 2.5 ounces this is not going to pull your pants down. The clip has great retention and the knife stays where you want it to in your pocket.

Deployment and Lockup

This is a Dimitry Sinkevich designed flipper made by Zero Tolerance, so the flipping action is outstanding. The detent is perfectly tuned for crisp, snappy flipping action each and every time. I’ve never “flubbed the flip” with this knife and I’d say the action is a solid “8” on the 0-10 scale. It’s good. Inside you have a caged bearing system. It is exceptionally smooth and you can shake the knife closed easily.

Please note I’m a lefty, so I don’t have any issues with putting my fingers on the lock bar when flipping the knife. I tried flipping this 0450CF with my right hand. Beside it being incredibly awkward for me, it works fine. No issues flipping open this knife. I think ZT fixed the issue that plagued their earlier knives.

Here is a shot of the 0450CF next to another excellent EDC knife, the Spyderco Sage 1:

For lockup we have a titanium frame lock with a stainless steel insert. Zero Tolerance does such a good job with these, that I almost feel that writing this section is unnecessary. The lock bar engages early and securely. The lockup is rock solid with zero blade play in any direction. The lock is smooth and easy to manipulate with no lock stick. This is titanium frame lock perfection and continues to be something of a gold standard in my world.

Blade centering is dead nuts center on my knife.

Zero Tolerance 0450CF Review – Final Thoughts

Ben was a little lukewarm on his 0450. He didn’t like the way the knife cut, the ergonomics, and he had issues with the action. Aside from that Mrs. Lincoln tells me the play was OK.

I think Ben raises valid points. A little knife like this should zip through stuff, but the combination of narrow blade and partial flat grind impacts the 450CF’s slicing performance. It still cuts, but it could be better. Personally, the ergonomics were spot on for my hand, and I found that the 0450CF flipped great. Ergonomics will vary from person to person, and I think ZT addressed the flipping action.

All in all, I am glad I picked up this little 0450CF. It’s as cool in person as I always hoped. I like the look of it over the standard 0450 and how it’s even lighter with this carbon fiber handle.

The 0450CF is an excellent little EDC knife in my book. With a retail price at close to $200 it’s not cheap, but I’m glad I went for it. The 0450 is probably ZT’s most practical EDC offering for the average person. This carbon fiber version takes things up a notch.

Zero Tolerance 0450CF; with 3.25” DLC-Coated S35VN Stainless Steel Blade, All-Black Carbon Fiber and Titanium Handle Scales, KVT Ball-Bearing Opening, Frame Lock and Reversible Pocketclip; 2.45 OZ.

List Price: $166.97

Price: $159.95

You Save: $7.02

Price Disclaimer

I recommend purchasing the Zero Tolerance 0450CF at Amazon or BladeHQ. Please consider that buying anything through any of the links on this website helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.

Zero Tolerance ZT 0450 Review

by Benjamin Schwartz 3 Comments

Despite positioning itself as a maker of hard use tools for hardcore individuals, Zero Tolerance has always had more universal appeal than its marketing would suggest – and I don’t think the company’s appeal has ever been wider than it is today.

Unlike sister brand Kershaw, there isn’t any internal division between ZT products: there aren’t ‘cheap’ and ‘expensive’ ZTs in the sense that there are cheap and expensive Kershaws; everything they make falls within the same general bracket of impressive machining and high-end materials; the price differences just indicate which high materials you’re getting and how much impressive machining you see.

Buy the Zero Tolerance 0450 at BladeHQ

And while ZTs may have been considered pretty pricey back in the day, as the market has shifted upwards their prices have remained relatively consistent, so that they seem more reasonable now than they did five years ago. So as the knife world has shifted into its current strata of price brackets, Zero Tolerance has found itself in a sweet spot between accessibility and quality.

All of this combines to put ZT pretty much at the center of current knife enthusiast culture. I’m sure there are soldiers, cops, and first responders who carry and use Zero Tolerence knives, but I would bet there are a lot more ZTs in the pockets of enthusiasts and on the shelves of collectors. That being said there has never been a ZT knife that really spoke to me.

I couldn’t find one that was ‘just right;’ this knife had a great design but is assisted, that one was the right size but inordinately heavy. It is this way for me with every knife ZT releases. Eventually, waiting for the Perfect Zero Tolerance became a kind of mania. Perfect design, perfect size, perfect price: I figured if I waited long enough such a ZT would come out.

But it never did, and eventually I got tired of waiting and picked up the knife that came closest to that ephemeral, unrealized Perfect ZT I have in my mind: the Dmitry Sinkevich-designed ZT 0450. It can’t possibly be perfect, but is it any good? Let’s take a look.

General Dimensions and Blade Details

The 0450 has a blade length of 3 3/16”, a handle length of 4 1/8”, and an overall length of 7 3/8”. It weighs 3.04 oz. and is made in the USA. I want to mention here that this is a damn good looking knife. It comes up later and I don’t want to keep repeating myself in the interim, so just keep in mind that almost every inch of this knife is nice to look at.

The ZT 0450’s racy drop point is a good EDC cutter. It has much more straight edge than belly, which I don’t necessarily mind, and a very sharp tip. A chunky grind means two things: 1) both the tip and cutting edge are hardy enough to beat on, however 2) it isn’t as good of a slicer as you would hope for. Given the fast, futuristic, aggressive styling I was hoping for equally aggressive cutting performance but that isn’t what you get here.

However, trading some sliciness for durability isn’t exactly Faustian as long as cutting performance is still the favored attribute to some degree, and the 0450 meets this criterion. It’s best-suited for medium-duty tasks like cutting through cardboard or plastic, but you aren’t going to hate slicing food with it either. It works.

When Zero Tolerance began using Elmax a few years ago accusations of improper heat treating and burnt edges were leveled at them from the enthusiast quarter. The 0450 is made from S35VN, not Elmax, but there is a small portion near the tip of my 0450’s blade that looks burned:

From what I understand, this occurs during the edge grinding portion of manufacturing, and is localized to the burned area – in other words, if it is burned, it shouldn’t affect the performance of the edge in general – and my experience bears this out.

S35VN is great. I would almost say it’s boring, because it doesn’t have the epic abilities and tragic flaws of a steel like M4, but for the average user (and most enthusiasts are average users AT BEST) that is a good thing. I’m convinced that you could sharpen S35VN with even a rudimentary setup and some patience. The S35VN here performed just as well as I expected it to, and if there were any problems in the burned portion I didn’t notice.

Handle, Ergonomics, and Pocket Clip

One of my biggest ergonomic pet peeves is when a knife has a beak or a scoop at the butt end of its handle that either doesn’t accommodate all four fingers ahead of it, or that makes my fingers feel crammed because it ushers them too close together. I really want this issue to become the Too Many Finger Grooves of 2017, because it nearly ruined the Para 3 for me and designers need to stop doing it.

By all accounts it looked like the 0450 would have this problem, and even now I’m not sure that it doesn’t. I can get all my fingers between the finger groove and the beginning of the beak, but not easily, comfortably, or without premeditation; my fingers would never fall across the handle this way naturally.

But the way I think you’re supposed to hold the knife is how I ended up holding the Para 3: with my index finger in the groove, my middle and ring in the “valley,” and my pinky landing on the far side of the beak. This feels natural, but, again, it isn’t the natural way my hand wants to hold the knife.

If I just grab the knife without thinking, my pinky lands right on the tip of the beak. This doesn’t sound like it would be comfortable, but thanks to the big chamfer around the scales, the tip of the beak isn’t too pointy and it works. And even during hard cuts this wasn’t that uncomfortable because most of the pressure is focused on the portion of the knife between your thumb and forefinger.

So I don’t know where I come down on this. The way it appears the knife is designed to be held isn’t natural, and the way it seems natural to hold it doesn’t feel right, even if it isn’t intolerable. At the end of the day I guess I’m okay with this handle, because it allows for a very slim and stylish profile, and going into it you know the 0450 isn’t going to be an ergonomic masterpiece.

The 0450 itself is so very narrow that it would be a pretty decent carry regardless of what kind of clip it had. This is one of very few flipper knives whose flipper tab doesn’t annoy me in the pocket, and I think that’s a function of the knife’s extreme narrowness. The 0450 would be a great carry even with a bad pocket clip, but hey: the clip here is anguish free. The same clip seen on the Kershaw Dividend, and in that review I expressed a little anxiety about its stability over time, but I’ve had no issues here.

Deployment and Lockup

I’m going to grouse a lot in this section so I’ll say this up front: The ZT 0450’s action is fast, sure, very snappy, addicting, and fun. The flipper tab is well designed. It is a great example of why flippers are so hot right now. Okay, grousing starts now.

I was prepared for the lock bar issue, and it is definitely present: if your fingers are on anywhere on the lock bar, the detent is such that the knife will not open – it feels almost like you have a secondary safety feature engaged. When I first got the knife I had a couple attempted deployments where the blade refused to budge.

However, if you align your fingers with the clip it keeps them off the bar; now that’s where my fingers naturally goes when I flip open this knife. Still, not cool, and from what I’ve seen it’s present on newer models as well. I’d like to see ZT put this issue to bed.

I think ball bearing pivots are bad. I hope the recent issues with the Advocate will precipate a move back to traditional washers, which are more durable, have no moving parts, are easier to maintain, and don’t cause as much unnecessary wear. Ball bearings against naked titanium (as we have on the 0450) is probably asking for trouble in the long term – albeit in the long, long term that most of us won’t see, as we trade and swap knives and carry different ones on different days. But still.

I also think that the ZT 0450’s fall shut action is dangerous and not to be desired. I’ve cut myself more times on the ZT 0450 than any other knife I’ve owned, either because it rolled shut so fast I didn’t have time to get my knuckles out of the way, or I pushed it a little bit and it gained enough momentum to keep rolling when I didn’t want or expect it to. Not necessary.

Lockup via titanium frame lock with a steel insert, is good however. If you look at the knife from the side, it doesn’t seem that a lot of the blade tang actually makes contact with the lock face, and disengagement has no feedback or friction whatsoever, but there is no blade play and the lock has never been other than stable and reliable. The double over-travel stop provided by the insert and by the clip is a nice touch as well.

Zero Tolerance 0450 Review – Final Thoughts

There is no meaningful area in which the Zero Tolerance 0450 excels other than carry. It isn’t a great cutter. Ergonomically, it’s kind of a mess. The deployment is problematic. But I still like it.

As much as I hate to say it it comes down to the look. Sinkevich has one of the strongest aesthetics around and the 0450 benefits greatly from that. It isn’t my style necessarily, but we don’t see a lot of knives that are this visually confident, and I think I responded to that. If you showed me a less interesting design that had all of these quirks and problems, I would never even think of buying it.

Not exactly the resounding praise, but praise nonetheless. I can’t not like this knife, even if there are so many things about it that I don’t like. It stops just short of brilliance but looks stunning doing it.

Zero Tolerance Small Sinkevich Pocketknife (0450); 3.25” Stonewash S35VN Steel Blade with Satin Finish; Stonewashed Titanium Handle with KVT Ball-Bearing Opening, Frame Lock and Reversible Clip; 2.9 OZ

List Price: $143.00

Price: $143.00

Price Disclaimer

I recommend purchasing the Zero Tolerance 0450 at Amazon and BladeHQ. Please consider that purchasing anything through any of the links on this website helps support BladeReviews.com, and keeps the site going. As always, any and all support is greatly appreciated. Thank you very much.