●Chain rivet bicycle set: bicycle chain repair kit for bicycle repair. Includes chain lock pliers, bicycle chain rivet, chain gauge, 4 pairs of bicycle chain rivets for 6-7-8, 9, 10, 11 speed chain and instructions for use. ●High precision bicycle chain gauge: quick and easy to measure wear. Made of hardened steel, two precision indicators of 0.75 and 1.0. So 0.75 is the official wear limit for the use of the chain, 1.0 for use on steel sprockets. ●Professional chain rivet bicycle: easy to break, easy to re-chain, unique groove on the top make it easy to see how far you pop the pin out and remove the cut chain with pin from the tool. Chain rivet also equipped with a thimble and a hook, the hook can be more convenient to help you attach the chain. ●2 in 1 Chain Pliers: chain link remover and connector 2 in 1. Ergonomic handle for comfort and ease of use. Compatible with 7, 8, 9, 10, 11, 12 speed bicycles. Chain lock pliers of the pliers handle with a clasp, close the clasp for small size for storage ●Bicycle chain repair kit multifunctional: it is small and durable, easy to carry, can be used as a travel tool kit to fix most problems of bikes. Bicycle chain tool suitable for trekking bike, city bike, mountain bike and road bikes, etc. On the bicycle chain tool there is grease. Please note that it is not dirty. Lubricating oil allows for smoother use of tools, prevents rust and extends service life.