The Transit is a Bicycle Lock and Carrier Combination. It is able to alternate between the two functions when the cyclist reaches his destination or is about to set off for his commute. It comprises of a lock/carrier body, the shackle, and a clamp mechanism to which the lock/carrier mounts when being used to carry the cyclist’s bag. For cycling, The Transit allows bags to be secured using commonly found bungee cords. When locking, it is able to secure the bicycle’s saddle, frame and two wheels. Read Less