These brackets secure to the Jeep Wrangler JK 2 Door's roll bar and connect to the Front Runner Foot Rails that are mounted on the roof. Comes in a set of (2) two, left and right side. Mounts to the roll bar and uses its strength to support the load of the roof rack and cargo. Bypasses the fiberglass roof, to eliminate any weight or stress. The mounting system can be used without the hard top fitted. Installation hardware included. NOTE: Cannot be used together with soft top roofs.