1. 【DURABLE】 The gasket is made of passivated 304 stainless steel, which has good resistance to oxidation, moisture and more durability. 2. 【SIZE】 304 stainless steel external tooth washer set includes six sizes M2.5 \ M3 \ M4 \ M5 \ M6 \ M8, different size gaskets can meet your different needs. 3. 【EASY TO USE】 It is designed with external teeth, and it is easier to install and use. Just put the gasket into the screw or bolt to achieve the fixing effect. 4. 【OUTER TEETH LOCK WASHERS】 After quenching and hardening, the hardening rate is moderate and it is commonly used in hex screws, nuts and washers. 5. 【ELECTRONIC COMPONENT】 Can be widely used in household and commercial appliances, electrical connections on cars and ships, etc.