Drillpro 70x20x10mm grinding wheel adapter changed electric drill into grinding machine Specification: Color: orange/green/ white Size: 70x20x10mm Grit: 120-150 Grit Connecting rod diameter: 8mm Suitable for: White wheel: for grinding stainless steel Orange wheel: for grinding stone material Green wheel: for grinding tungsten steel Features: 1. providing three kinds of grinding wheels. 2. make your electric drill in a grinding machine. 3. durable, convenient. Package Included: 1 x Grinding Wheel Adapter Set Note: Does not include electric drill