Flap Disc, Abrasive Type Coated, Grade 80, Backing Plate Material Fiberglass, Connector Size 7/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 27, Overall Diameter 4 1/2 in, Quick Change System Not Applicable, Series Predator Ambush, Backing Material Cloth, Backing Weight Y, Coating Coverage Closed, Grit 80, Maximum Operating Speed 13,300 RPM