Cast steel shot is widely used for descaling and derusting of steel workpieces before coating. In this case, centrifugal shot blasting equipment is often used. The ball shape and small hardness will prevent the steel shot from causing great wear to the equipment. Steel shot is also widely used in the foundry industry. When the workpiece is taken out of the mold, remove the sand on the surface of the workpiece with steel shot. When steel shot is used with suitable equipment, because it is durable, it must be the abrasive you use for surface cleaning.