Finishing Drum, Abrasive Material Silicon Carbide, Abrasive Type Coated/Non-Woven, Backing Material Cloth, Backing Weight Not Applicable, Connector Size 5/8 In. -11, Connector Type Threaded Hole, Grit 80, Series Two-In-One, Flap Width 2 in, Maximum Operating Speed 3, 800 RPM, Overall Diameter 4 1/4 in, Grade Medium