Washer attachment: The lock washer applies elastic force between the head of the fasteners and the substrate, so that the hard washer is closer to the base material, resulting in greater friction and strength, not easy to fall off, widely used. in mechanical equipment, shock absorbers for industrial production, workshop bearings, etc. High quality:: The lock washer is made of durable heat-treated 304 stainless steel, has good tensile strength, good corrosion resistance and oil resistance, has a long service life. A variety of sizes : M3/M4/M5/M6/M8/M10/M12, a total of 7 sizes, can well meet your different needs. Perfect accessories: A total of 270 star washer, with a transparent plastic box, durable, easy to quickly find the gasket you need, at the same time marked with a size label, can also be used as a storage box, store small accessories such as earrings, hairpins.