Convenient and practical: The bicycle chain connector part adjusts the chain length correctly, cleans the bearings and lubricates them. Easy to install, convenient and easy to use. Easy to clean: No need to remove the chain for cleaning. Suitable for mountain bike and road bike chains. 3 Different Chains: The bicycle gear chain connector has 3 different colors to meet your different needs. Good quality and suitable for long-term use. REPLACE IF LOST: Bike Link Speed Chain Connectors easily replace old or damaged links. Also used for failed links. NOTE: It is recommended to use this bike chain connector part with a quick change tool. It can be used repeatedly. Limit yourself to 3-5 reps. Replace the quick release when changing the chain. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store