Polished stainless box rails. Slide up anchor loops that hide away when not in use.
Originally on 2007-2013 body style Chevy Silverado 1500 /gmc Sierra 1500 with short short box. But may fit others.
Here are measurements to see if they might work on your truck. Overall length 61 inches Centre of mount hole to centre of other mount hole around 58 1/4 inches. Approximately 2 inch diameter Ends can be removed and the tubes could be cut to shorten if needed. I mounted the same set of rails but different light on another truck and just bolted it straight to top of box and never used pockets. I had flip up hooks in pockets.
Includes mounting hardware