It is refined by drawing, cutting and rounding. It is mainly used for deburring and cleaning of various products of aluminium alloy and zinc castings. The proportion is close to the iron and steel, and the hardness is low, so it can not only remove the larger burrs without harming the surface of the product, but also form an anti-corrosion and anti-rust layer on the metal surface. In addition, for different with the aluminium abrasives, the ignition point of dust is very low so it’s safe, and it has the whitening effect to the surface of the workpiece.