Once these brackets are installed on a Front Runner Rack, no tools are needed to remove or install a cargo box. Simply release the tabs on the 4 latches and lift the roof box away in seconds. No more wrenching in tight spaces, now you can effortlessly remove and load your cargo box when needed. This strong and rattle free mounting system is built off-road tough for use with Front Runner Racks. Works with Thule, Yakima and other popular roof cargo boxes. Secures in place with 4 latches with safety catches. For added peace of mind, lock your latches in place using RRAC134. The brackets are small, unobtrusive and can be left on the roof rack when your cargo box is not mounted, leaving vast rack space available. No modification required. Removed roof cargo boxes can be stored on the ground, raised slightly off the floor by the supplied steel bushes. Removal of OEM mounts may be required. Supplied with all required mounting hardware. Fitting instructions are included.