421-38009 Features: -General purpose off-hand work. -New improved bond, reduces dressing and is freer cutting, reducing heat. -Tool Shape: Type 1. -Abrasive Material: Brown Aluminum Oxide. Product Type: -Bonded Abrasives/Cut Off Wheel/Grinding Wheels. Generic Dimensions: -6-8'' include bushing for 1/2'', 5/8'', 3/4'' and 1'' ( for 8'' wheels ) arbor holes. Dimensions: Overall Product Weight: -1.85 Pounds.