Flap Disc Abrasive Type Coated Abrasive Material Ceramic Grade Coarse Backing Plate Material Plastic Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating High Flap Disc Type Type 27 Overall Diameter 4 1/2 in Series Elite MAXTRIM Backing Material Cotton/Polyester Backing Weight YF Grit 40 Maximum Operating Speed 13 300 RPM Features Trimmable