Double-disc locking washers have seen a sharp increase in market demand in recent years, mainly used in high-speed rail, ships, aircraft, automobiles, fixtures, automation equipment, and other fields, with the advantages of locking and easy disassembly. Compared with traditional methods such as flat spring washers, adhesive bonding, and anti-loosening nuts, its effectiveness is greatly increased, making it one of the best anti-loosening products currently available. The materials of this product include 304, 316, Mn steel, with electroplating such as Dacromet.