This product comes with two keys and a key holder to install on the frame, which is easy for you to install and use. The main advantages of this bicycle lock is corrosion-resistant, rust-proof, and anti-tarnish so that it can withstand bad weather. It is made of high quality metal and steel wire materials. The bracket can be installed with a seat tube diameter of 29.8 or less, and the lock is generally wound on the seat or frame. The length of this product is 1 m. Perfectly suitable for mountain bike, road bike, folding bike, etc. Item name: bicycle lock Material: metal, steel wire Features: lightweight, durable and practical Color: black Size details: Length: 1.15m/45.28 inch (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 bicycle lock 2 x keys 1 x bracket key holder