Kryptonite Evolution Mini-7 with Flex Lock is a robust U-lock made of 13 mm thick super-strong steel by Kryptonite. It stands out as the safest option for shielding your bike from thieves due to its high level of burglar resistance. You can easily carry the U-lock using the provided holder, or alternatively, stow it in a backpack or bike bag. The lock's hardened steel arc is highly resistant to breaking or splitting, ensuring durability. When using a U-lock, it's advisable to secure the bike to a solid object and loop the lock around both the frame and the rear wheel if possible. The included steel cable allows you to lock the front tire in conjunction with the rear tire and frame by looping the cable through the front tire and the U-lock. Ultra-strong 13 mm hardened steel shackle resists cutting and prying attempts Three stainless steel keys with one LED key fob for added visibility Double deadbolt protection: Patented design defends against twist attacks Compact design: Smaller cross