RAND VARIABLE SPEED BENCH POLISHER / BUFFER- Polishing/Buffing Machine 5" diameter jewelry Rand bench-top buffer / polisher It works great with on any items including aluminum, chrome, jewelry, precious metals etc. Buffing speed is continuously variable between 2000 and 7000 RPM. Works with buffing wheels up to 5" diameter. Includes two buffing wheels approximately 4-1/4" diameter X 3/4" thick.