Rhino-Rack Backbone Jeep JT Gladiator Mounting System - The Rhino-Rack Backbone is a custom vehicle specific designed interior and exterior structure for the Jeep JT Gladiator Pickup Truck. The 2 mounting plates on each side of the fiberglass roof are connected to the interior frame and vehicles roll cage. Utilizing the interior structure, Rhino-Rack have been able to allow for a maximum load rating of up to 220lb on the roof. Features On roof installation, no canopy removal required. Single person installation No measuring required Specifically designed to be used with the Jeep JT Gladiator Pick Up truck Stylish and low profile design Made from strong and durable materials allowing for maximum carrying capacity Black powder coating for increased corrosion resistance Suits Pioneer Platform 52121/42121BF along with Vortex and Heavy Duty Cross Bars 2-hour installation time 5 Year Warranty