Flap Disc, Abrasive Type Coated, Abrasive Material Ceramic, Grade 60, 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 Predator FF, Backing Material Polyester, Backing Weight Y, Coating Coverage Closed, Grit 60, Maximum Operating Speed 13,300 RPM, Color Yellow, Features Trimmable, Resistance Properties Heat