This heavy-duty bike lock provides increased security, strength and style. With 10mm wide and 6 foot long heavy-duty flexible steel cable, the vinyl coated lock minimizes scratching while protecting your bike. Plus, the new MatchKey Security System provides an unparalleled solution for finding your bike lock key. WordLock recognizes that consumers have many keys and frequently find it challenging to know which key opens which lock. Now, MatchKey solves that problem in 3 ways: We match key color to the lock color, we laser etch a unique word on your bike lock head and the same word on the matching key and we created a unique shaped key that stands out from all the others. Problem Solved.