Dremel 84922 Silicon Carbide Grinding Stone  ( Dremel 84922 )

DESCRIPTION A high-quality industrial abrasive made for extended usage. USES Ideal for sharpening, deburring and general purpose grinding on harder materials—including stone, glass, ceramic, porcelain, gemstones and nonferrous metals. Specially designed for working with conic surfaces. TIPS - For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down. This provides plenty of shank for the collet or chuck to hold onto.