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Description
Experience the pinnacle of Japanese knife-making artistry with the Rockstead SHU-CB (KOI). Fusing ancestral samurai craftsmanship with modern metallurgical technology, this luxury folding knife is meticulously designed for discerning collectors and elite everyday carry (EDC) enthusiasts who demand nothing less than absolute perfection. At its heart lies a mirror-polished ZDP189 steel blade, hand-honed in Sakai to an astonishing 67 HRc for unparalleled edge retention. Encased in a DLC-coated titanium handle featuring an intricate, traditional Japanese Koi engraving, it delivers a flawless button-lock deployment—yielding a harmonious masterpiece of terrifying cutting power, mechanical fluidity, and timeless cultural heritage.
Key Features & Why It’s Extraordinary
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Mirror-Polished ZDP189 Steel Blade: Engineered with Rockstead’s legendary ZDP189 powder stainless steel, boasting an incredible hardness of around 67 HRc. This delivers unmatched edge retention and a terrifyingly sharp cut that lasts longer than standard folding knives.
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Traditional Japanese "KOI" Motif: The handle elements are beautifully engraved with a Japanese carp (Koi)—a cultural symbol of strength, perseverance, and good fortune.
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DLC-Coated Titanium Handle: The solid titanium handle is treated with a Diamond-Like Carbon (DLC) coating, providing exceptional scratch resistance, durability, and a sleek, tactical matte finish.
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Flawless Button Lock Mechanism: Equipped with a buttery-smooth button lock system that ensures secure blade deployment and effortless, safe one-handed closing.
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Discreet Pocket Clip: Includes a sleek, low-profile pocket clip for secure and comfortable everyday carry.
ZDP189 Blade Introduction
ZDP-189 is a high-carbon, high-chromium powder metallurgy steel renowned for its extreme hardness, often exceeding 64 HRC, which delivers peerless edge retention and aggressive cutting performance. This performance comes at a cost; its massive carbide volume makes the steel notoriously difficult to sharpen and increases brittleness, posing a risk of chipping under heavy lateral impact. Furthermore, while technically stainless, its high carbon content necessitates diligent maintenance to prevent oxidation, making it a specialized choice for precision cutting tasks rather than rough, heavy-duty utility.
SHU CB-ZDP (KOI)
| Total length | 194mm |
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| Blade length | 82mm |
| Blade material | ZDP189 |
| Blade thickness | 3.2mm |
| Hardness | Around 67 HRc |
| Weight | 100g |
| Handle material | Titanium |
| Handle coating | DLC |
A clip also comes included with this knife. This knife is used button lock system.
Rockstead SHU (KOI) FAQ
Q1: What makes the ZDP189 steel on this Rockstead knife so special? A: Rockstead treats its ZDP189 steel to an astonishing hardness of around 67 HRc. Combined with their signature hand-polished mirror finish, it offers world-class edge retention and a terrifyingly sharp cut that lasts significantly longer than standard premium pocket knives.
Q2: How durable is the "KOI" engraving on the handle? A: Extremely durable. The intricate traditional Japanese Koi motif is engraved onto solid titanium, which is then shielded by a Diamond-Like Carbon (DLC) coating. This advanced treatment provides military-grade resistance against scratches, wear, and everyday pocket friction.
Q3: Is the button lock mechanism safe for heavy everyday carry (EDC)? A: Yes, absolutely. Machined to near-zero tolerances, the button lock provides a vault-like, rock-solid lockup with zero blade play, giving you the confidence of a fixed blade. It also allows for completely safe, smooth, one-handed deployment and closing.
Payment & Security
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Delivery and Shipping
In-stock orders will be shipped in 48 hours except weekend and holidays.
Pre-orders pls subject to the indicated Pre-order shipping dates.
From China warehouse: Estimated delivery in 15–21 business days