Fiber Disc, Abrasive Type Coated, Abrasive Material Aluminum Oxide, Backing Material Fiber, Backing Weight Y, Grit 100, Overall Diameter 4 1/2 in, Series F240, Maximum Operating Speed 11,000 RPM, Resistance Properties Tear, Connector Size 7/8 in, Connector Type Unthreaded Hole, Color Brown, Grade Medium, Package Quantity 25