The Thule 538XT - Cable Lock is a large gauge steel cable with integrated key lock offers convenience and security.  The cable stretches up to five feet.  It's great for bike racks and adds extra security for roof or rear mount carriers.  This product includes a Thule lock cylinder and two keys and is part of Thule's Same Key System which means the lock cylinder can be removed and replaced with a Thule lock cylinder from a matched set.