Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Medium Backing Plate Material Fiberglass Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating Standard Flap Disc Type Type 29 Overall Diameter 5 in Series XB1186 Backing Material Fiberglass Backing Weight X Grit 60 Maximum Operating Speed 12 000 RPM