These 1/8” (0.32 cm) thick grinding wheels contain 3M™ Cubitron™ Abrasive Grain for a fast cut, and a more consistent finish on all metals. Thinner wheels are more flexible. Smooth operation with minimal vibration. For weld removal and heavy deburring on steel, iron, stainless steel and aluminum. Discs are 1/8” (0.32 cm) thick with a 7/8” (2.2 cm) shaft. Must be used on a tool with a guard.