Descriptions: Made of high quality diamond resin materials, it is of strong strength and long service life, which is designed to grind carbide and hard steel, stone, metal and other processing and polishing. Feature: Made of high quality diamond resin materials, strong strength and long service life. Designed to grind carbide and hard steel, stone, metal and other processing and polishing. Mainly used in alloys knives, saw blades, serrated grinding process. Resin bond for uncomplicated grinding operation with good material removal rates, while maintaining a low thermal influence on the work piece. Can be used in various tools and cutter applications. Spec: Material: diamond, resin Process: sintering Granularity: 180 Outer diameter: 120mm / 3.94inch Bore diameter: 20mm / 0.79inch Thickness: 10mm / 0.39inch Weight: Approx. 203g Package included: 1 x Grinding Wheel Note: 1. Due to the difference between the monitors and light effect, the picture may not reflect the actual color of the item. 2. Please allow 1-3mm error due to manual measurement. Thanks for your understanding.