With PopUp "SB" Extended Couplers you get 9" or 16" more clearance between the truck cab & trailer nose and between the truck tailgate & trailer bulkhead, great for towing with a shortbed truck! You`ll have more trailer swing and more room for hook-up. Fabricated with extra heavy wall tubing for maximum strength. All hardware, including coupler release cabling, is included. Installation is very easy and takes about 1/2 hour.