Features and Benefits: Flap Wheel, 1/4" Shank Mounted, Carded. ; Featuring durable, high-grade aluminum oxide coating for aggressive cleaning and refinishing on most wood or metal surfaces.; Ideal for mounting on power drills or other chuck driven machines.; Bulk version is Forney 71689.; Wheel Diameter: 2" (50.8 mm), Wheel Height: 1" (25.4 mm), Grit: 80, Max RPM: 25,000.;