Comes with 2 keys You can take a keys for daily use while leaving another at home in case you lose 1 The chain of this bike is enclosed in protective cloth sleeve that could effectively protect the chain from being rusted and scratches The small bike chain can not only be used to bicycles, but also can used for motorcycles, scooter, balances bikes and strollers, door, fence, grills, sports equipment, outdoor equipment, Tool box, ladder Small size, easy to carry It is not easy to break when pulling and cutting, and it is safe to use High strength metal head, Enduring, strong, safe antitheft, anticorrosion and antirust, Manufacturer: Junifeey