Neiko 10205A 6" Benchtop Grinder and Buffer, 1/2 HP, Long Shaft with 2 Buffing Wheels, 3, 450 rpm, Clear Compatible with grinding, these buffing wheels are permanently lubricated and shielded bearings to provide durability and longer life Powerful 1/3 hp motor is good for heavy duty grinding, smoothing and polishing of metal surfaces Strong cast iron base decreases vibrations as opposed to aluminum and is built to last Double buffing half inch arbor size wheels work on brass, copper, gold, silver, nickel or chrome plate, brass or copper plate, and thermosetting plastic The benchtop buffer features a no-load speed of 3450 RPM with 270 watts of power