Wet Stone Grinder and Polisher - 220V 4 1/2 inch Water-Feed Electric Polisher/Grinder is used for polishing, shaping, core drilling and light grinding. 8 amp, 800-watt, variable speed machine is a powerful workhorse suitable for use in the shop or on the job site. Double insulated and equipped with a HD power cord and a built-in GFCI (Ground Fault Circuit Interrupter) for safety. 220V Power.