Features1The high-quality chain makes the chain whip particularly durable. Carbon steel, with high strength and strong structure. 2Essential tool for the installation and removal of the inner or bottom bracket on the bicycle. 3Compact and easy to carry, durable metal construction, robust. 4A necessary small tool set for outdoor cycling for safe and comfortable travel, it is also ideal for any home bike mechanic. 5Package included: 1 x sprocket wrench with chain, 1 x crank extractor, 1 x bottom bracket crank remover, 1 x sprocket remover.SpecificationMaterial: Carbon SteelFunction: The bicycle crankset is disassembled, the jack is extended, and the square mouth and spline crankset and crank can be removed, which is more practical and convenient.Uses: Disassembly and installation of crank crank, can be removed square mouth crank and crankAuxiliary tools: need an adjustable wrench to usePackage List1 x Sprocket wrench with chain1 x Crank extractor1 x Bottom bracket crank remover1 x Sprocket remove