The easiest way is to use an electric grinding wheel to rub the hammer. The more sparks, the brighter the wear, the worse the wear resistance. The hammer with good wear resistance has fewer sparks and the color is dark red. When the strong wear-resistant hammer made by the "thermoset layer" double alloy coating technology is polished by the electric grinding wheel, since the hardness is high and the wear resistance is good, no spark can be seen. Water Jet Cutter Head Assembly Cutting Head Assy,Waterjet Cutting Heads,Waterjet Cutting Head,Water Jet Cutter Head Assembly Foshan Hairan Machinery And equipment Co.,LTD , https://www.hairannozzle.com