1、Specially designed for bicycles and motorcycles, securely locked safety locks provide practical external security protection. 2、Made of high quality harden alloy, waterproof, anti‑rust, anti‑pry and formed in one piece. It is exquisite and compact, which can be put directly into the pocket for easy carrying and does not take up space. 3、Super B class locking core, higher safety factor, effective protection technology. Round hole design, more anti‑theft. 4、Free key, press to lock. After opening the lock, turn half a turn to unplug the key and press it to lock again. The hole of the disc brake should be more than 5.5mm(0.2in), and the depth of eating disc should be less than 30mm(1.2in) . 5、Suitable for most bicycles, electromobiles and motorcycles with disc brake.