description of goods:This safety U-lock helps solve some of the safety issues associated with leaving a bicycle in a public place, using a lock to secure the bicycle to a stationary object such as a fence, lamp post or public bicycle frame.It works when connected to the included locking mechanism. This locking mechanism can be easily installed on your bike, including the kit, which will be very safe once installed. Then each time you want to lock the bike, fix it to a stationary object, slide the lock into the bracket and turn the key to secure it.Feature: Made of high quality zinc alloy material,durable in use. U-shaped heavy duty lock for bicycles, scooters and motorcycles. High security with hardened shackle. Vinyl coating to protect the paint from work. Includes 2 keys, it is convenient to use. Spezifikations:Condition: Brand NewMaterial: zinc alloyColor: BlackType: U-lockLock mechanism: unlock with a keyLength: about 20 cmAccessories: Suitable for bicycles, scooters and motorcycles, but can also be used to securely lock the door.Packing size: 19.5*13*3cm/7.7*5.1*1.2inPackage List:1 * Secure u Lock1 * Locking Mechanism with Two Bolts2 * Key1 * Screw Package