Flap Disc, Abrasive Type Coated, Abrasive Material Ceramic, Grade Extra Coarse, Backing Plate Material Plastic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 5 in, Series Red Heat R961, Backing Material Polyester, Backing Weight Y, Grit P40, Maximum Operating Speed 12,000 RPM, Color Red, Features Trimmable