1 Bike Tool Kit: Made of high quality steel with durable and precise parts. Includes bicycle chain pliers, bicycle chain tool, bicycle chain wear indicator included. Very convenient.High precision bicycle chain gauge: chain control, quick and easy measurement of wear. Made of hardened steel, two precision screens of 0.75 and 1.0. 0.75 is the official wear limit for chain use, 1.0 for use with steel sprockets.Professional Chain Puller: Chain Separator - Easy to cut, easy to put back chain, unique groove on the top to easily see how far the spindle has been pulled out and remove the cut chain with the tool spindle.2-in-1 link pliers: Bicycle chain link pliers, ergonomic handle for comfort and ease of use. Compatible with GANG 7, 8, 9, 10, 11, 12 bikes. The bottom of the clip has a clasp, close the clasp to save space.Multifunction: Small and sturdy, easy to carry, can be used as a travel tool kit to solve most bicycle problems. Suitable for Dutch bikes, trekking bikes, road bikes, city bikes, mountain bikes and racing bikes etc.Three equals sevenThe bicycle chain repair kit includes 3 tools. These 3 tools can be directly equivalent to 7 tools: chain cutter, chain hook, chain extractor, chain installation pliers, 0.75 measuring caliper, 1.0 measuring caliper and wear measuring caliper .Anti-rust coatingThe unique anti-rust coating is waterproof to maximize tool life. The maintenance precision can be kept to the maximum.Easy to useThis professional bicycle chain repair kit can repair the bicycle chain in 5 steps without complicated disassembly. Repairs.Easy to carryWith these lightweight tools, you can put them in the back pocket of your bike to handle emergencies anytime without having to carry bulky tools.