Flap Wheel Abrasive Material Aluminum Oxide Abrasive Type Coated Backing Material Cotton Backing Weight X Grit P60 Series R207 Flap Width 1 in Maximum Operating Speed 30 000 RPM Shank Size 1/4 In.-20 Overall Diameter 1 in Grade Coarse Shank Type Threaded Coating Coverage Closed Resistance Properties Wear