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.**Features*** Z Safe +: highly powerful quadruple locking system. Delivers a very high degree of protection in high risk areas* High resistance: Tensile and torsion strength. Antitheft and anti drill**Specifications*** **Level of security:** 17 - For areas with a high risk of theft* Material: Hardened Steel* Mounting: Adjustable on downtube - Dia from 20mm to 80mm* Dimensions: 115 x 230mm / 4.5 x 9.1"* U Dia: 14mm / 0.5"* Keys: 3 included