The model u5 of the new trelock u lock series convinces like the rest of the series with its attractive product design. But here too the qualities are right. A 15 mm thick shackle made of hardened steel and a secure disc style cylinder make life difficult for bicycle thieves. The compact size of the mini version is easy to transport. The flex version also offers a loop cable to connect the bike to a fixed object. Complete solution use the 120cm cable to secure front wheel or accessories high security disc style cylinder is pick and drill resistant shackle length 17.8cm shackle diameter 15mm dust cover stops dirt blocking the keyhole protective vinyl coating replacement key service comes with universal mounting bracket sold secure gold rated 5 6 on trelock's security scale