Northern Industrial Tools Drill Bit Sharpener Head — 5/16in. Dia. to 5/8i

Sharpens bit sizes 5/16in. to 5/8in. (8 to 16mm). Stone position adjusts to prolong its life. U.S.A. Additional Specs * Head diameter: 3in.H. * Base diameter: 11 1/16in. * Installs easily into our Item# 15206 sharpener