Grobet File Co. Of America, LL Grobet Diamond File Needle Equalling 170/220 Grit Fine

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 2-1/2″ (64 mm) long diamond surface. Illustration is to show shape, all sides coated.