Quick-Change Sanding Disc, Abrasive Type Coated, Abrasive Material Ceramic, Backing Material Polyester, Backing Weight YF, Coating Coverage Open, Grade Coarse, Grit 60, Overall Diameter 3 in, Quick Change System TSM, Series 984F, Maximum Operating Speed 30,000 RPM, Resistance Properties Water, Color Maroon, Package Quantity 50