Feature:1. Premium steel bike chain links connectors is suitable for 12 speed chain.2. Fit chain with the correct length, clean bearing, and lubricate.3. No need tool to remove the chain for cleaning.4. Suitable for mountain bike and road bike chain.5. 3 different colors for you to choose, meet your different needs.Specification:Item type: Bike Chain LinkCondition: 100% brand newMaterial: steelWeight: Approx. 28gOptional Color: golden, colorful, silverSuitable: 12 speed chainAssembly Guide:1. Install the right length chain, clean the bearings and lubricate them.2. Don't forget to lubricate the pin.3. Insert two halves of the missing link into the end of the chain.4. Press the two halves of the missing connection contact together.5. Lock in place by unlocking the chain.6. Open: Press the two plates together and slide the ends of the chain against each other..Package List:4 Pair x Bike Chain LinkNote:Recommended to use with quick-release tool. It can be re-used. It is limited to 3-5 times. Need to replace the quick-release buckle when you change the chain.