3M 31922 Green Corps 7" x 7/8" 36 Grade Grinding Disc Grade 36 Use for grinding door skins, MIG welds or any kind of metal or fiberglass grinding. Other applications include paint, rust, and weld removal and metal work. 3Ms standard class abrasive Other applications include paint, rust, and weld removal and metal work Ideal for Body Work Pack of 2 discs