The Thule One Key Lock Cylinder system comes with 6 keyed alike locks and two keys.
Click here to launch fit guide.
These are a must to keep your racks in place for when you return. SO far the locks smooth to operate.
Best things ever! At these remote landings you have to lock everything. Racks on top of your truck. Ball on your truck, hitch to ball and spare tire to trailer and lug nuts on trailer tires. In SC no license is required for trailers so they snatch and grab what ever they can and go to GA & FL and sell it.