The Heavy Duty RCL roof rack system attaches to the Rhino-Rack Backbone. This simple design improves on the existing strength of your Jeep Wrangler without compromising the sleek and bold look of this iconic vehicle. The Rhino-Rack Backbone is fitted to the internal chassis of your Jeep Wrangler. This design will not hinder any of the current capabilities of your Jeep’s design. The legs and cross bars of the RCL system can easily be removed when they are not required using a revolutionary trigger locking system.