ITEM NAME:125mm Diamond Grinding Wheel Cup 180 Grit Cutter Grinder for Carbide Metal A6G5 125mm Diamond Grinding Wheel Cup 180 Grit Cutter Grinder for Car.Grit: 180#. item: grinding wheel cup. 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.