Whether it is traveling cross country or going on an outdoors adventure, no one should be limited on what you can bring along. Having crossbars provides the freedom to carry additional items along for the journey. BrightLines double folding kayak racks are made of heavy-duty aluminum with a Max. load of 150 lbs. The upright arm can be locked at any position from flat to 90 degrees. The cradles that hold kayaks can also slide to accommodate different sizes of Kayaks. Mounting brackets can fit square and round crossbars.