Degritting and polishing solution of hardware and tools

The spanner is a common hardware tool and a casting. Before the spanner is assembled, shot blasting or sand blasting is required to remove impurities such as sand, burr, rust, and iron oxide, etc., and allow the spanner blank to leak out of the original metal layer to achieve a shiny, mirror-like brightness. While the steel shot constantly hits the spanner blank, the strength of the spanner metal crystal structure can be increased, and the hardness can reach the spanner's prescribed standard.