3 Different ColorsThe bicycle chain part has 3 different colors to meet your different needs. Suitable for mountain bike and road bike chains. Assembly Instructions: 1. Install the chain of correct length, clean and lubricate the bearings. 2. Don't forget to lubricate pin.3. Insert the two halves of the missing link into the ends of chain.4. Press the missing connector pin halves together. 5. Lock the chain by unlocking it.6. To open: Press the two boards together and slide the chain ends over each other. Easy to Carry and Avoid LossThese bicycle chain connectors are reusable and easy to assemble and disassemble. Suitable for mountain bikes and road bikes, easy to carry and prevent loss. Easy to CleanInstall the chain to the correct length, clean and lubricate the bearings. Cleaning does not require any chain removal tools. High QualityThe links of the bicycle chain are made of high-quality steel, which is strong, wear-resistant and durable. The missing links are made of durable steel for long-term use.