This Makita PW5001C Electric Wet Polisher has a built in water regulator, an auto stop safety lever, a side exhaust and a 1 year warranty. It is excellent for polishing stone and can be used with diamond polishing pads up to 7" and with diamond cupwheels up to 4" diameter. This Makita Polisher produces professional quality results.
Things to know about this polisher:
If an electric wet stone grinder is what you want, MAKITA is another great brand!