This is a resin-bonded diamond sanding wheel 50,000 grit made by Diamond Pacific. It removes scratches from previous wheels and polishes a cab. It is 6″ x 1 1/2″ for an arbor size of 1″. Plastic bushing for any arbor size available, see my listing. This wheel is brand new, never used, fresh from the factory, MADE IN USA. It can be used on any arbor with a little water to polish those cabs. It’s rubber backing allows it to conform to the surface being sanded, eliminating flat spots. A $180 Value! Other sizes and grits available at similar savings.