8-inch Wet and 6-inch Dry Grinder 110V, 3.4 Amps with Tool Rest and Eye Shield Included Maximum speed: 160 RPM wet; 3450 RPM dry Wheel diameter: 8" wet; 6" dry Wheel face: 1-5/8" wet; 13/16" dry Shaft Diameter: 1/2" wet; 5/8" dry Weight: 30.20 lbs.