Pearl Abrasive BG610120 Green Silicon Carbide Bench Grinding Wheel with C120 Grit For use on work benches and floor standing machines. Wheels are not affected by water, oils, or acids Green Silicon Carbide bench grinding wheels for fast, burr-free grinding of tungsten carbide-tipped tools, ferrous, and non-ferrous metals Wheel includes a nested reducing bushing set: 1 to 3/4, 5/8, and 1/2"