United abrasives – sait 22020 cut off wheel type 27 a24r 4-1/2″ x 7/8″ 24 grit aluminum oxide aggressive cutting performance over a wide range of applications. Our unique super-lock hub combines both a mechanical locking system and chemical bond providing one e of the safest, vibration-free designs in the industry. Aluminum oxide grain. For general purpose cutting. Combines fast cutting with long life