Straight cylinder style abrasive cartridge rolls: 1/2" Diameter by 1-1/2" face by 1/8" center hole. Aluminum oxide abrasive. For light stock removal in recessed and hard to reach areas. Tapered design allows for more versatility. Recommended for use with F-26 abrasive belt grease. Mounts on a cartridge roll mandrel with an 1/8" diameter pilot. 100 rolls to a box, 400 to a case.