Scotch-Brite(TM) Hookit II(TM) Production Clean and Finish Disc, 11 1/4 in x NH A VFN, 10 per case Delivers high cut, long life and better finish. Used on aluminum, stainless steel, plastics, wood and fiberglass to finish, paint prep, surface blending. Hookit II(TM) reinforces discs. Aluminum oxide mineral very fine. Color: maroon MOS:2800 RPM