Dynabrade 51580 7-Inch - 8-Inch Diameter Electric Rotary Buffer, 0-3000 RPM, 11 Amp, 5/8-Inch - 11 Spindle Thread Replaces Model 51610 11 amp motor, 0-3,000 RPM (variable 0-3,000 RPM dial) Double-insulated (Class II) housing, 8 ft. (2.44 m) flexible cord, and built-in tool rest. Flexible in cold Optional 50853 Backup Pad and optional 90082 Polishing Pad available Achieve fine finish on a variety of surfaces