A Mirror-Polished Ketuo Kyzaghan Shows What Zircuti Costs

There is a point in every collection where a knife stops being a tool and becomes a display object. A limited Ketuo Kyzaghan posted to r/knifeclub sits precisely on that line. Mirror-polished Bohler M390 blade, polished natural monochrome zircuti scales, clip, backspacer and thumbstuds, DLC-coated hardware, and a mirror-polished Titan Spine Lock.

The underlying knife is Mantis Bladeworks design work, and the numbers are not subtle: a 3.74-inch blade at 5.0 mm thick, 8.98 inches overall, ceramic ball bearings, and a spring-loaded captive pivot that allows tool-less disassembly. Five millimeters of blade stock is roughly 40 percent thicker than a typical EDC folder, which makes this an overbuilt knife first and a pretty one second.

The Titan Spine Lock is the mechanical highlight. It has an integrated secondary lock that engages with the blade both open and closed, which is a belt-and-suspenders approach you rarely see outside custom work. The owner's comparison was to a Rockstead REN, calling the polish virtually identical — a claim worth taking seriously, because Rockstead's mirror finishes are the reference standard in production knives.

What this actually costs is the instructive part. Zircuti is a zirconium-titanium laminate that has to be machined and finished carefully, and a mirror polish on M390 means hand work at every stage. Both raise the price of the knife by more than their material cost, because labor dominates. You are paying for hours, not ounces. There is also a maintenance bill: a mirror finish shows every fingerprint, and a 5 mm blade in polished steel will look handled after a week of pocket time.

The honest verdict: this is not a better cutting tool than a $200 production folder with the same lock geometry. It is a better object. For buyers who want one knife that justifies a display case, these limited runs deliver. For buyers who want a working knife, a 5 mm blade in mirror polish is a contradiction.