Product Features:Features 3M's tough and best in class Cubitron II mineralGrains of ceramic/aluminum oxide blend are precisely-shaped, uniformly-sized and vertically orientedSlices through hard metal for fast cutCubitron II abrasives run cooler, reducing risk of metal discoloration/oxidation and heat related stress cracksA grinding aid further enhances cooler running on high-strength steelExceptionally long-lasting belt performs consistently and reliably throughout its lifeUsed with the 3M File Belt Sander, easily grinds out rivets and spot welds