Cold Steel CS-21ST: Designed by celebrated custom knife maker Andrew Demko, our Spartan is one of our most popular folding knives. The Spartans super-sharp blade is made from Japanese AUS10A Steel and was designed to echo the aesthetics and cutting performance of the world famous Kukri. Its distinctive Kopis-inspired handle is precision injection molded out of Griv-Ex with heat treated steel liners, in addition to our famous Tri-Ad lock, makes for a knife that is incredibly safe and secure. The Spartan also features the patented Demko thumb plate, which can be used to open the knife like a conventional \"one handed opener\" or be snagged on the edge of a pocket during the draw stroke and opened at lightning speed!