U-shaped bike accessory
I believe the answer is:
lock
(Other definitions for lock that I've seen before include "Fastening device" , "Bolt" , "Mechanism to keep closed, door say" , "Security device - bit of hair" , "Fasten securely" .)
I believe the answer is:
lock
(Other definitions for lock that I've seen before include "Fastening device" , "Bolt" , "Mechanism to keep closed, door say" , "Security device - bit of hair" , "Fasten securely" .)