The DEWALT 4-1/2" x 1/4" x 7/8" General Purpose Metal Grinding Wheel (DW4514) is a professional solution for a range of grinding applications. The grinding wheel is made with high performance aluminum oxide for long life and high material removal and 3 full sheets of fiberglass for durability and safety. DEWALT developed a proprietary material mix to maximize the wheel's lifespan and help you minimize tool replacement costs. With a high grain concentration, you are assured of aggressive grinding action and smoother running wheels, no matter what the job.