Flap Disc, Abrasive Type Coated, Abrasive Material Ceramic, Grade Extra Coarse, Backing Plate Material Fiberglass, Connector Size 7/8 in, Connector Type Unthreaded Hole, Density Rating High, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series Blaze R980P, Backing Material Polyester, Backing Weight Y, Coating Coverage Closed, Grit 36, Maximum Operating Speed 13,000 RPM, Color Blaze, Features Longer Abrasive Flaps, Resistance Properties Fray