Property: 1.It's made of first grade grits:WA 2.Type:cymbals ,2nets in the grinding wheel,medium hard 3.Excellent grinding performance 4.Used safely and efficiently when work at 80m/s Useage of the grinding wheel: Mainly used for grinding the welds, burrs and rough edges in the automobile,ship-building,chemical and metallurgical industries. 1.50pcs/carton 2. According to the customers' requirement.