This product comes with two keys and a key holder bracket to mount on the frame, which is easy for you to install and use.The main advantages of this bike lock is corrosion resistant, rust-proof, anti-deform so that it can withstand bad weather.It is made of high quality metal and steel wire material. The bracket can be installed with a seat tube diameter of 29.8 or less, and the lock is generally wound on the seatpost or frame.The length of this product is 1.15m.Perfectly suitable for mountain bike, road bike, foldable bike, etc.Item Name: Bike LockMaterial: Metal,Steel WireFeatures: Lightweight, Durable, PracticalColor: BlackSize Details: Length: 1.15m/ 45.28'' (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bike Lock2 x Keys1 x Key Holder Bracket