The K-Traz U17 is a U-lock with a loop made from very high-resistance steel. This anti-theft device offers a quadruple locking, ultra-performance system. Fitting to the bike is quick and easy using the mount frame (included) that can be used on any tube from 20 to 80 mm in diameter. Provided with 3 keys and the possibility to duplicate keys in case of loss. Unique serial number.