Engineered to deliver performance unequaled by any other file, for use on ultra hard materials. Carbide, hardened steel exotic metals, ceramics and glass are no match for these precision files. Excellent material removal is the result of a unique process which bonds the 21/2 in (64 mm) long diamond surface. Available in fine grit, medium grit and coarse grit. Overall length is 51/2 in. Set of 5 in vinyl pouch contains one of each; equaling, half round, round, square and three square. Medium grit, 120/140.