Serious bike lock security is challenging for two reasons. First, useful high security locks are generally very heavy, making portability a major issue. Second, if you have manageable high security, the design must be useful in real life applications. Enter the RockyMounts Warrant U-Lock. With more of a square-shaped "U" in the 14mm hardened steel shackle, the Warrant offers greater locking usefulness and rates out at a seriously stout Security Level of 8.

• Dimple key and cylinder design
• Molded silicon shackle cover
• Potential pocket use
• 79mm x 130mm
• 3 keys included