1. [Imported lock cylinder and dust cover] The D-type lock cylinder of the bicycle is made of C-grade pure copper blade, with a precise structure to prevent various technical openings. After locking, the cover can be rotated to protect the lock head from dust and water. In addition, the bicycle lock heavy-duty anti-theft combination is equipped with two rust-proof copper keys with complex serpentine grooves, which is very convenient to use. 2. [Double opening] Our electric scooter lock bicycle u-lock combination (some people call it D-lock) is a double opening, and the thief needs to break the u-shape on both sides of the u-lock (Candado para Bicicletas) at the same time to open it, which is better than the single opening u-bar bicycle lock. 3. [Thick silicone bicycle lock with password] This U-bolt electric scooter anti-theft lock is made of 16 mm/0.63 inches (including 0.1 inch friendly silicone cover) hardened high-performance alloy steel, which can resist cutting and lever attacks, increase the sturdiness and durability of the lock, so the U-lock electric bicycle lock will provide more security for your bicycle. 4. [Large U-lock Size] The size of the bicycle U-lock is 9.84 inches by 6.22 inches, which is larger than a 9.7-inch tablet or magazine, making it easy to carry. In addition, it comes with a mounting bracket, suitable for all-around tripods with a diameter ≤ 1.18 inches (30 mm).