Williams Blade Design OZF 003 Osoraku Zukuri Folder 5.5″ Satin MagnaCut Camo Carbon Fiber by FatCarbon

Williams Blade Design OZF 003 Osoraku Zukuri Folder 4.5″ limited to 200 pieces.

The OZF 003 is a limited-edition folder—only 200 pieces produced—created through a unique collaboration between Williams Blade Design, FatCarbon Materials, and LionSteel. This knife brings the legendary Osoraku Zukuri blade shape into a modern, full-size folding format.

This full-sized Osoraku Zukuri folder has been refined for performance. The outer profile has been slimmed down while the blade length has been increased to a full 4.5” (115 mm), resulting in a sleek, ergonomic design that fits comfortably in hand while delivering maximum cutting length in a discreet package.

The handle is constructed from FatCarbon carbon fiber, known for its ideal strength-to-weight ratio, and paired with a titanium frame lock, creating an exceptionally strong and reliable build.

The blade is made from 3/16″ (4.7 mm) thick CPM MagnaCut steel, offering excellent edge retention, toughness, and corrosion resistance—hallmarks of high-performance steel. This knife represents the pinnacle of folding knife design from Williams Blade Design.

Williams Blade Design / USA

Williams Blade Design. Father and son. Father – a well-known American Far East martial arts trainer, previously designing a new knife for the CRKT knife company, Son – proudly continuing and bringing a breath of fresh air to Father’s design work. The result are Williams Blade Design proprietary projects, which are finally known and appreciated in the knife industry by top-shelf knifemakers..

“Designed for those whose life depends on their tools” –  words well reflecting the spirit of Williams Blade Design‘s designs, indicate what the emphasis is on design work. Interesting shape, high-quality materials and full usability are certainly the main determinants of their activity.

International Collaboration / European Production

The OZF 003 is the result of an international effort: designed in the USA by Williams Blade Design, using carbon fiber made in Lithuania by FatCarbon, and manufactured in Italy by LionSteel—renowned for their precision craftsmanship and one-piece SOLID handle designs.

The Osoraku Zukuri Blade

Inspired by traditional Japanese sword geometry, the Osoraku Zukuri blade shape is both distinctive and functional. Its dramatic belly provides excellent control during slicing tasks, while the reinforced, needle-sharp tip excels in piercing. A signature feature of this blade style is the break point that divides the cutting edge into two distinct sections—improving versatility and edge tracking.

Excellent MagnaCut steel

**MAGNACUT**: CPM MagnaCut steel, produced by the world-renowned Crucible Industries company, is the most advanced product of the American manufacturer. Sinter stands out among other excellent types of steel from this manufacturer.

**CORROSION RESISTANTE**: Greater than in the case of other excellent steels, for example, S90V, S35VN, S45VN or 20CV steel.

**OVERLOAD STRENGHT**: Similar to very strong, rust 4V, significantly exceeds in this respect the parameters of the following steels: CPM154, 20CV, S45VN, S35VN and S90V. The strength of the cutting edge, on the other hand, is inferior only to the S90V and 20V steels known for their hardness, but more difficult to sharpen.

**SUM UP**: MagnaCut is a steel with very balanced properties, however, it excels in virtually every area appreciated by knife users (stainlessness, lateral strength, cutting edge retention).

Smooth Deployment, Secure Lock

The knife opens via a flipper tab, which also acts as a finger guard once deployed. The titanium frame lock is fitted with a steel lockbar insert and a ceramic detent ball, ensuring smooth and consistent action without marring the blade. A hardened stainless steel stop pin keeps the blade perfectly aligned when closed.

IKBS Bearing System

Deployment and closing are powered by the IKBS (Ikoma Korth Bearing System) ball bearing pivot, offering glassy-smooth operation. If blade play develops over time, the pivot screw can be adjusted to restore tight tolerances.

Titanium + FatCarbon Handle

The handle combines lightweight FatCarbon Camo carbon fiber scales with a CNC-machined titanium frame, integrating the locking mechanism directly into the frame for maximum durability.

Stainless Steel Deep Carry Pocket Clip

Equipped with a stainless steel deep carry clip for discreet pocket carry. A lanyard hole at the rear of the handle allows for paracord, bead accessories, or additional retention options—helpful for securing the knife in bags, organizers, or packs.

Video

Specifications

• Blade Type: Folding, Osoraku Zukuri profile, flat grind, plain edge
• Blade Steel: CPM MagnaCut @ 62 HRC, satin finish
• Handle: Titanium + Camo Carbon Fiber by FatCarbon
• Locking Mechanism: Frame Lock with steel insert
• Opening Method: Flipper, IKBS ball bearing pivot
• Included: Knife, certificate of authenticity, manufacturer packaging
• Dimensions:
  • Overall Length: 262 mm | 10.3″
  • Blade Length: 115 mm | 4.5″
  • Blade Thickness: 4.7 mm | 3/16″
  • Handle Length: 145 mm | 5.7″
  • Handle Width: 30 mm | 1.2″
  • Handle Thickness: 15 mm | 0.6″
• Weight: 160 g | 5.6 oz
• Production Volume: 200 pcs
• Release Date: May 2025
• Designer: Williams Blade Design
• Manufacturer: LionSteel, Italy

Maintenance

1. Remember! Every of our knives are extremely sharp, so be careful when handling them!
2. Do not use your knife for something besides it’s intended purpose! Do not use the knife as a can opener, screwdriver, chisel, hammer, crowbar etc.
3. After using your knife with sea water, blood, fruits or other corrosive mediums, always rinse the knife with fresh water and dry it off.
4. Do not wash the knife with harder chemicals or in the dishwasher. This may damage or destroy the knife.
5. Before storing your knife, apply thin film of high-quality gun oil or special knife oil or wax to knives. We recommend that you always keep your knife and sheath clean and dry when not in use.
6. Always keep your knife sharp, so it can always take care of you.