The Thule 512 Lock Cylinders let you secure your Thule rack feet for added safety and peace of mind. Almost all Thule carriers and feet are sold without locks, but these theft-deterrent cylinders can be matched, allowing you to have just one key for your whole Thule system. The 512 comes with two cores, two keys, and a change key to remove cylinders, allowing use by multiple users. These durable locking cylinders are a must-have for that new Thule carrier you just invested in, and as you add carriers, you can special order cores to use with your existing system. What's in the Box? 2 x lock cylinder cores, 2 x keys, change key, and instruction guide Manufacturer's Warranty Limited lifetime warranty