This is the Kershaw Speedform II Knife model 3550.. features an ELMAX blade & is made in the USA. ELMAX is a powdered steel that is known for its resistance to corrosion and excellent edge retention. It’s known for its low amount of non-metallic inconsistencies, its even distribution of carbides, and its ability to be hardened to a 60+ on the Rockwell Hardness Scale! Available at www.Kershaw-Knives.net