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. Measuring 4-1/2 inches in diameter and 1/4 inch thick, these Type 27 wheels are designed with a soft N-grade bond, making them particularly effective for weld removal tasks. With a maximum RPM of 13,300, the premium aluminum oxide grain ensures superior performance, allowing you to tackle tough jobs with ease. Packaged in quantities of ten, these grinding wheels promise to deliver exceptional results that outshine competitors in both durability and cutting speed.