Park your bike with peace of mind when you use Giant's Surelock Protector 1 combo pack. The U-lock features a hardened steel shackle to resist cutting attacks, and uses an XP4 Quattro locking mechanism for unequaled strength. It comes with five keys, one of which features an LED light. The included steel cable loops through your wheels and makes sure that potential thieves walk on by. To keep things simple, Giant included a lock mount that fits nearly every bike frame.