Material: Made of premium steel, durable and marked parts. Mini and convenient storage, the edge of the handle is treated with burrs and your hands will not be hurt. Function: bicycle chain clamp, mini clamp with magic buckle. Easy to break, easy to unlock, unique groove on the top for easy view. With back crimping function. Design: 9.2cm overall length, compact and easy to carry, can be put in backpack etc. Can be filled. The end clip can be installed with an inner cable cap. Curved handle with crazy type spring. The storage loop is worn at the bottom. When not in use, it can be folded and closed for storage, which is convenient for storage. Selection: Complete tools, small size, durable all-steel construction, can be used as a travel tool, to solve the problem of the bicycle chain, can be used on most bicycles, mountain bikes, etc. To be applied. How to use: determine the length of the chain, remove the pieces of chain from the chain at both ends, put the magic loop from inside and outside at both ends of the chain, finally place the two ends of the magic loop on each other's chain.