These brackets have been developed by Ford to brace the floor to the wall of the load box to ensure that the off-road durability performance of the load box is maintained with the installation of load-bearing elevated accessories.When installing accessories extending above the load box side rail and weighing more than 88lb (40kg) must have load box reinforcement brackets installedExamples of these include service body, bed caps, ladder racks, carrier cross bars, load-bearing elevated accessoriesThese reinforcement brackets have been designed specifically for Ford Licensed Accessories and their suitability for use with any aftermarket (non-Ford Licensed) accessories will need to be determined by the aftermarket manufacturer or supplierDealer installation recommended