Dynabrade 57126 3-Inch 76 mm Diameter Dynabuffer Random Orbital Polisher, 10000 RPM, Rear Exhaust, 5/16-Inch - 24 Female Thread 3-Inch Dia. Dynabuffer Air-Powered Buffing Tool, ideal for use in Two-Step Polishing System. Excellent for buffing out sanding scratches Moves backup pad and optional polishing buff in 14 mm dia. offset orbit. Runs at 10,000 RPM free speed, then slows to 7,000 RPM under load Non-marring housing cover is insulated for operator comfort. Optional 53163 Side Handle available Throttle lever may be positioned for right or left hand operation. Optional 01462 Safety-Lock Lever available Tool includes 56142 Hook-Face backup pad, and 97166 Hanger Bracket. Polishing buffs are sold separately