1、High‑quality steel can be stable and durable, and super torque can help you save energy. 2、Used in combination with a wrench, it is suitable for mountain bike crankshafts and used to disassemble square and knurled crankshafts. 3、It is easy to operate and very suitable for bicycle maintenance. 4、Bicycle chain remover, hook lock ring tool and bottom bracket assembly tool all in one, multifunctional 3‑in‑1 bottom bracket wrench, cassette freewheel wrench and bottom bracket wrench (for the cover). 5、Bicycle chain remover, can be repaired when the cassette flywheel is removed, used to remove and install the flywheel and shaft. 6、Puller tool, extended ejector, used to remove chain links and cranks. Very suitable for square cone crank sets. 7、The bottom bracket tool, 20 teeth, is used to remove the bottom bracket of the bicycle. The high‑strength steel structure is very durable. 8、The bicycle chain cutter has a compact and portable design, two‑tone grips, comfortable operation, dual drive pins, easy to chain, and specially designed to remove and install chain bolts. 9、It can be used for all kinds of bicycles, including mountain bicycles, road bicycles, foldable bicycles, children's bicycles or ordinary daily bicycles, etc. 10、Due to its light weight, the bicycle chain repair tool kit can be carried even when riding.