Engineered for precision and efficiency, these aluminum depressed center wheels from CGW Abrasives are ideal for grinding non-ferrous materials such as aluminum, copper, and zinc. With a size of 4-1/2 x 1/4 x 7/8 inches and a maximum RPM of 13,300, these wheels are designed to deliver superior performance and durability, thanks to their premium aluminum oxide grain and soft N-grade bond that excels at weld removal. Packaged in quantities of 25, they promise to outlast competitor products, making them a reliable choice for both professional welders and DIY enthusiasts alike.