Flap Disc, Abrasive Type Coated, Abrasive Material Ceramic, Grade Coarse, Backing Plate Material Nylon, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Series ENDURO-FLEX Turbo, Backing Material Plastic, Grit 36, Maximum Operating Speed 13,300 RPM, Features Trimmable