Wheel locks suck, which is why they are not on your truck. You can get 3 new keys from McGard, though, and four folks can lock their spare on the back. These locks will screw all the way down on the tire carrier. I think a new key is about $18 shipped, last time I looked. I'll give you $30 shipped for the set, I could use a lock for my new winter bomb. Figure a Castor and a studded Hakka are worth at least $200 hanging there, it's a good idea to lock it on.