Deburring wheel embedded with aluminum oxide crystals. Used for blending surfaces prior to final sharpening and removing file markings. No need to use compound. A groove can be cut into this wheel to sharpen the hook of the knife. Dimensions: 6" diameter, 3/4" thick supplied with telescoping bushing for various diameter shafts. Baldor 1/4 hp buffer operating at 1800 rpm is recommended.