Flap Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Grade Coarse, Backing Plate Material Phenolic, Connector Size 7/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 5 in, Quick Change System Not Applicable, Series Tiger Paw, Backing Material Phenolic, Backing Weight X, Grit 40, Maximum Operating Speed 12,000 RPM