Features 1、Carbon Steel Material: This U lock is made of solid carbon steel, providing a sturdy and wear proof construction that is highly resistant to cutting and hydraulic shearing. 2、Precise Locking Mechanism: The lock core is made of pure copper blade, ensuring a precise structure that prevents technical unlocking. With this lock, you won't have to worry about being obstructed when unlocking your bike. 3、Three Keys Included: This carbon steel bike U lock set comes with three keys, allowing for easy replacement and providing reliable backups, easy to install and use. 4、Compact and Portable: With its small and portable design, this U lock can be conveniently stored in your bag, making it easy to carry around and providing effective theft protection. 5、Versatile Usage: The solid carbon steel U lock can be used not only for bikes but also for doors, motorcycles, tricycles, and other items that require secure fixing. Item Type: U Lock Material: Carbon Steel Weight: Approx. 1289g/45.5oz Package List 1 x U Lock 3 x Keys