Key Features:Bicycle security for moderate to high crime areas, with an extra long shackle14 mm hardened Kryptonium steel shacklePatented double deadbolt locking mechanism for extensive holding powerHigh security ovalised cylinderReinforced sleeve over crossbar and cylinder provides enhanced security protectionReinforced internal housing increases resistance to twisting and leverage type attacksOffset key location and overhead cam locking mechanism resists leverage attacksDouble deadbolt locking for extra strength against leverage attacksAnti-rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise3 keys, including 1 lightedThe Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizesThe Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapesThe mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit a