Features: Practical bicycle chain buckle of chain magic Buckle have all speed magic button No tools need to remove the chain for cleaning As a addition to your seat pack, it just may save the day when you have a broken chain on the trail or road. Suitable for mountain bike and road bike. Easy to install,practical and convenient to use
Assembly Guide: 1.Fit chain with the correct length, clean bearing and lubricate. 2.Do not forget to lubricate the pin. 3.Insert both halves of the missing link into the chain ends. 4.Press both halves of the missing link connector together. 5.Lock in place by pulling the chain apart. 6.Opening: press both plates together while sliding the chain ends towards each other.