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zdp-189

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.

Rockstead RYO Review
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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.

Rockstead RYO

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).

Rockstead RYO with Box

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.

Rockstead RYO

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.

Rockstead RYO Handle

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.

Rockstead RYO Jimping

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.

Rockstead RYO Thumb Studs

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.

Rockstead RYO Button Lock

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.

Rockstead RYO Pocket Clip

Rockstead RYO Pocket Clip Concealed

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 Lanyard Hole

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”.

Buy the Rockstead Higo at BladeHQ
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.

Filed Under: Collectable Knives, Folding Knives, High End Pocket Knives, Rockstead Knives Tagged With: Button Lock, Dmitry Sinkevich, titanium, zdp-189

Spyderco Caly 3 Carbon Fiber Review

by Dan Jackson 18 Comments

Last Updated: August 7, 2019
Hands down the best part about operating a website like this, is the excuse to play around with bad ass knives like the Spyderco Caly 3.5 in Carbon Fiber. This special version of the Caly3 uses exotic Japanese laminated steel and carbon fiber handle scales to give the original Caly3 an extra touch of class. The original Spyderco Caly (short for Calypso) was introduced in 1998 and featured a 4″ blade and micarta scales. Spyderco has refined the knife over the years in their quest to get this knife to become “part of the hand”.

Spyderco Caly 3.5 CF Review
Buy the Spyderco Caly 3 at BladeHQ

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Before I launch into the details of this review let me just say, this knife is really nice. I got one mainly as a collectible but this thing is built like a bank vault and Spyderco considered every detail so if you intend to use the knife for Every Day Carry (EDC) it will perform. My first impressions leave me with nothing but good things to say about this blade although I will do my best to find some weaknesses for those seeking the dirt on this high end production knife.

General Dimensions and Blade Specifics

The Spyderco Caly3 CF has a total length of 7 inches, a blade length of 3 inches, weight of 3 ounces, and is made in Japan. The knife is slender with a total thickness a hair under 3/8 of an inch. These strike me as ideal dimensions for an EDC knife and I think EDC is exactly what Spyderco had in mind when they put together the Caly3. It also makes a handsome gentleman’s folder.

Spyderco Caly3 CF: Back Side

The blade on this knife is very interesting. It’s a standard Spyderco leaf shaped blade with a thumb hole for deployment and a long curving belly for plenty of cutting space. The blade stock starts at 1/8″ thick and it tapers down to a fine, razor sharp point. The entire blade has been given a beautiful full flat grind and a 12.5 degree edge.

The blade steel Spyderco selected for the Caly3 CF is ZDP189/420J2, a Japanese laminated steel. This is accomplished by sandwiching a piece of ZDP189 between two pieces of 420J2. The 420J2 outer layers are incredibly tough. 420J is commonly used by high end knife manufacturers for liners due to the strength and corrosion resistance of the steel. The cutting edge is ZDP189, an ultra high end steel that is extremely hard. This steel gets incredibly sharp and holds it’s edge very very well. The problem with ZDP189, is that it’s extreme hardness makes it difficult for some to sharpen.

Spyderco Caly3 CF: Closeup of Laminated Steel Blade

Another potential problem with the 420J2/ZDP189 combination is that 420J2 scratches relatively easily. That said, 420J2 is very stain and corrosion resistant, so the blade is less likely to rust. For those considering the Caly3 CF for EDC, scratching will happen with any knife. Arguments on the pros and cons of the 420J2 outer layer could go on for days, so I’ll just leave it at that.

And on the subject of scratching, one concern with this knife is that the tang rubs up against the knife when deploying and you get very fine circular rubbing marks on the tang. I’ve noticed that this doesn’t only happen with my knife, others have reported it too, and from a collectors standpoint it’s a bit problematic. Perhaps these marks can be carefully buffed out; I will update the review if I try this.

A very cool result of this laminated process is that you can see where the the 420J2 ends and the ZDP189 begins. At first glance, it almost appears as if the knife has been given a saber grind, but upon closer inspection you can see that it is in fact one full flat grind.

Handle, Ergonomics and Pocket Clip

The handle has steel liners (that have been painstakingly and attractively milled out to reduce weight) and polished carbon fiber scales. The carbon fiber is lightweight and handsome however it doesn’t provide the kind of grip a textured G10 handle does. The handle does feel a little slippery when wet. Again I think if Spyderco was going for all out utility they would have selected a different handle material (they did in fact do that for their regular Caly3.5). Even with the lightweight carbon fiber the handle has a little heft to it.

Spyderco Caly3 CF Handle

As far as ergonomics are concerned, the knife has excellent jimping on both the thumb ramp and the finger choil. The design of the thumb ramp and choil make the knife fit very well in the hand. Despite the absence of textured handle scales when you are gripping the knife you feel in control, largely due to the excellent ergonomic design. The carbon fiber scales have been radiused and there are no sharp edges in the palm. I think Spyderco came very close to their goal of making the knife an extension of the hand.

The pocket clip is simple yet elegant. It is a single blackened piece of wire that is held in place with a star bolt. I like this style of clip for smaller knives because it is plenty strong and very discrete. Spyderco designed the Caly3 for tip up carry and the clip is reversible. The knife rides low in the pocket and the clip has good retention.

Spyderco Caly3 CF Pocket Clip

Deployment and Lock

The Caly3 CF uses the signature Spyderco thumb hole for blade deployment. I have found the deployment of the Caly3 to be slow. There is quite a bit of blade retention and it appears to be impossible to flick open. Maybe I need to loosen my pivot screw up? I’d love to hear some opinions. When you do open the knife it clicks in place very forcefully with a nice snap.

The Caly3 is a lockback knife and the lockback is positioned in the middle of the handle. There is absolutely zero blade play and it almost feels as if you are working with a fixed blade knife. This is one of the most solid locking knives I have handled and I am very impressed by the way this knife engages.

Spyderco Caly3 CF: Lockback Detail

Spyderco Caly 3 Carbon Fiber Review – Final Thoughts

The Spyderco Caly3 CF is one hell of a knife. Beautiful materials, rock solid construction and an amazing attention to detail make this a near perfect EDC option. However, the steep price, slow deployment and non-textured handle scales may make people think twice about making this their go to blade. I will say that if you end up deciding on a Caly3 CF, you won’t be disappointed.

Spyderco Caly Prestige Knife with 3.40' ZDP-189 Stainless Steel Blade and Black Carbon Fiber Handle - PlainEdge - C144CFPE
Spyderco Caly Prestige Knife with 3.40" ZDP-189 Stainless Steel Blade and Black Carbon Fiber Handle - PlainEdge - C144CFPE
  • Iconic Design: The Calypso is one of the classic mainstays that spawned numerous variations and converted legions of knife buyers to the benefits of flat-ground, thick leaf-shaped blades.
  • More To Love: Available now in a premium variant, is the Caly 3.5 with a ZDP-189 blade and carbon fiber handle. The Caly 3.5 combines beauty and functionality into a new Spyderco classic.
  • Superior Blade Steel: The leaf-shaped blade is made of three layers of steel. The core is high carbon ZDP-189 Japanese powdered steel, the outer laminated layers are softer, pliable 420J2 steel.
  • Pocket-Friendly: It comes with a gray carbon fiber handle and a mid-positioned back-lock. Its low-seated wire clip designed for right-hand deep-pocket, tip-up carry.
  • Ergonomic: Great Ergonomics means more control over the cutting edge. The Caly 3.5 accomplishes this with a substantial finger choil located where the handle and blade meet.
Amazon Prime
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I recommend purchasing the Caly 3 Carbon Fiber at Amazon or BladeHQ. Thanks for checking out the review.

Filed Under: Collectable Knives, EDC Knives, Folding Knives, Gentleman's Folder, Spyderco Tagged With: carbon fiber, Made in Japan, zdp-189

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