The Rockstead KON-ZDP is a large Japanese sheath knife built around ZDP189 clad steel, Honzukuri geometry, a full-tang construction, a wood micarta handle, a SUS440C guard, and a dedicated sheath designed for field carry.
The blade is made from ZDP189 clad by VG10 and hardened to approximately HRc67. The ZDP189 core gives the knife its long-term edge retention, while the VG10 cladding improves corrosion resistance around the core steel. This matters because ZDP189, despite being classified as stainless steel, contains a very high carbon content and may develop small rust spots if exposed to moisture, salts, or an aggressive storage environment.
The KON-ZDP uses Rockstead’s Honzukuri convex geometry in a full-size blade format. The convex bevels are mirror-finished, while the blade’s flat section remains matte, creating a deliberate contrast between optical reflection and restrained surface texture. The absence of distortion in the reflected image is not merely a visual effect; it is evidence of the exceptional accuracy and smoothness of the convex Honzukuri bevels, combined with Rockstead’s extremely fine polishing.
The handle is made from wood micarta and built around a full tang. This gives the knife direct structural continuity from blade to grip. Unlike the removable-handle UN or DON series, the KON-ZDP is not designed for disassembly.
The KON-ZDP is supplied with a dedicated sheath equipped with a nylon belt and a movable attachment system. This construction is designed for field carry, allowing the sheath to follow body movement more naturally when walking, bending, or sitting. The knife is secured in the sheath through a friction-lock system. The fitted sheath holds the knife by precise contact pressure, reducing movement inside the sheath and helping protect the polished blade surface during carry and storage. For additional security, the sheath also uses a nylon strap with a snap fastener, giving the knife a second point of retention during active field use.
The knife is also supplied with a special silk pouch decorated with Japanese motifs. The pouch adds a softer storage and presentation layer, balancing the KON-ZDP’s practical full-tang construction with a quieter Japanese visual character.
Each Rockstead knife is supplied with an individual passport showing its serial number and actual measured blade hardness, confirming that the hardness value is recorded for the specific knife, not only stated as a general model specification.
