The Companion's simple yet ingenious mounting system requires only a 4" hole in the truck bed and does not require any mounting rails so its in and out of your truck bed quick and easy. The cam action latching mechanism is designed to be almost effortless, even under pressure, for easy hook-up and un-hook. The patented hydraulic dampener allows the head to pivot a full seven degrees and helps prevent side to side binding. The locking jaws are a full 1 1/8" thick and are machined to mate perfectly with the kingpin on the camper providing a positive worry-free hook up and the smoothest tow available. Features a high gloss powder coat paint finish will provide years of trouble free good looks. 18,000 GVW. Truck specific goosenecl mounting kit sold seperately.  Contact us for your more information.