Only 3 of the SOG Koji knives were ever made. This one is the very last one made. It was made by Japan’s most famous knife maker known as Koji. The blade is made of an exotic material known as Cowry-Y, a powder metallurgy steel (C 1.25, Cr. 14.5, Mo 3, V 1 and Nb 0.3) in Rc. 64, tempered to Rc62. The handle has black and white mother of pearl inlays, separated by nickel silver. Do to the nature of this purchase, returning it is not accepted.