1.Material: 304 Stainless Steel, stainless steel material which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. Environment-friendly, no pollution, high hardness.They have superior rust resistance and excellent oxidation resistance, which can ensure long time using. 2.Design: Square section spring washers give an extra secure fixing.Flat washers are designed for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.Spring washers are used to apply a pre-load or flexible quality to a bolted joint. Can also be used as a spacer. 3.Wide Applications: Suitable for interior decoration, outdoor construction, electrical maintenance equipment manufacturing, engineering machinery, agricultural machinery, transmission and distribution and furniture repair. Ideal for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection. 4.Benefits: Perfect for household tasks including electrical and commercial appliances, as well as protecting furniture during assembly.Assortment of quality washers for home, automotive, and shop use.