Outstanding lifespan when grinding metal! Robust aluminum oxide grains for long-lasting performance. We developed the PRO Metal for metalworkers who need a reliable and durable grinding wheel for metal grinding. The long-lasting PRO Metal bonded grinding wheel is equipped with high-quality aluminum oxide grinding grains to efficiently grind metal and steel. We combined the grains with functional fillers and embedded them in a phenolic resin matrix for stability, heat resistance, and reliable grinding performance. A precision-engineered fiberglass fabric reinforces the wheel and provides additional safety. It is free from iron, so you don't have to worry about rust on your workpiece when cutting stainless steel.