Features: Made of high quality material, wear resistance, long service time. Designed to grind carbide and hard steel, stone, metal and other processing and polishing. Resin bond for uncomplicated grinding operation with good material removal rates, while maintaining a low thermal influence on the work piece. Mainly used in alloy knife, saw blade, saw tooth processing and grinding. Can processing tungsten steel, quenching processing steel, special hard brittle materials grinding. Specifications: Material: Diamond, Aluminum alloy, Resin Binder: resin grinding wheel Grit: 180 Shape: bowl shape Process: sintering Outer diameter: 100mm or 3.9in Bore diameter: 20mm or 0.8in Package Weight: 250g or 8.8oz Package List: 1x Diamond Grinding Cup Wheel 1,Made of high quality material, wear resistance, long service time. 2,Designed to grind carbide and hard steel, stone, metal and other processing and polishing. 3,Resin bond for uncomplicated grinding operation with good material removal rates, while maintaining a low thermal influence on the work piece. 4,Mainly used in alloy knife, saw blade, saw tooth processing and grinding. 5,Can processing tungsten steel, quenching processing steel, special hard brittle materials grinding.