Rockstead HIZEN: a 73 mm ZDP189 blade, vacuum-forged to HRc67, polished until the edge reflects like obsidian glass. Continuous convex 30°–24° taper keeps hair-whittling sharpness for decades without resharpening. Aerospace duralumin handle, bead-blasted charcoal, weighs only 73 g; ceramic bearings snap the blade open with a whisper-soft click. Hidden liner lock, machined to ±0.02 mm, guarantees bank-vault solidity. Every surface—spine, pivot, clip—is hand-finished by one master craftsman in Osaka, creating a numbered pocket heirloom that outlives passports.
