3M Green Corps Reinforced Weld Grinding Wheel 01991 is designed for tough grinding and weld removal from hard-to-reach areas and internal angles in collision repair. This rigid, heavy-duty 3-inch diameter wheel is 3/16-inch thick and is built with fiberglass reinforcement scrims which help the wheel last longer. The long-lasting aluminum oxide mineral abrasive is heat-resistant and resin-bonded, giving this grinding wheel the durability and strength to cut through a wide variety of materials. The 3/8-inch center hole ensures secure attachment to common grinding equipment. Use at maximum 20,375 RPM. Always use with a wheel guard in place. 3M Green Corps Reinforced Weld Grinding Wheel 01991 makes grinding applications in collision repair fast, reliable, and secure.