Only 50 pairs in the world. Handcrafted and hand-engraved. These are the engraved models with some fine patterns engraved by a chisel. The designs are handcrafted by the artistry of a Mizutani expert. All the logo marks of the SWORD and MIZUTANI as well as the serial number are manually engraved. The exclusive carved genuine leather box is also hand made and has the chiseled corresponding serial number as well. Cobalt-molybdenum steel. Semi-flat screw. High performance carbon resin bearing. Ergonomic Design.