These are for use with the Thule square load bar roof racks. When I got mine it came with it, and I dont do either, so time to let them go. They are in pretty darn good shape, minus some scuffs and scratches, and the locks work perfectly. I only have one key for it, and its the same as the tower locks, but I think I could get another made, or one can be ordered from Thule. The only "problem" they have is one of the plastic wing nuts broke because the nut was frozen to the threads. I have fixed this by placing a larger wing nut under a standard nut and it tightens down beautifly.
I really dont know what these would be worth, so if you want them, shoot me an offer. Shipping will be extra, as they are kind of large.
This is the only pic I have of them off the car. You can see they are in pretty good shape, and Im sure had I spent a little time cleaning them up, they could look almost new. No, the complete roof rack is not for sale.

Thanks for looking