CGW Abrasives Bench Wheels, Brown Alum Oxide, Single Pack General purpose off-hand work. 6-8" include bushing for 1/2", 5/8", 3/4" and 1" ( for 8" wheels ) arbor holes. 10-12" x 1 1/4" includes bushing for 1 1/4", 1" and 3/4" arbors. 12-14" x 2" includes bushing for 1 1/2", 1 1/4" and 1" arbors. New improved bond, reduces dressing and is freer cutting, reducing heat Pack of 1