We purchased two sets of the 835XT J-Hooks to carry our new kayaks home in December. We also purchased the Thule roof rack system even though the j-hooks would have fit the factory rack on my Chevy Tahoe. I wanted the stability of the Thule rack considering the travel distance from home to any water location will require highway travel. I like the j-hooks and feel secure with our kayaks mounted on the Tahoe, my only beef is the whistling noise the racks make when the boats are not on the car! These are easy to use, easy to clean, store and remount when ready.