The B&W Extend-A-Goose coupler is a great addition for short bed trucks. This gooseneck extender offsets the trailer 10" for more turning radius. Designed with a Funnel shapped coupler for eisier hook-ups and heavy wall tube with internal gussets to provide maximum strengh. It fits all standard 4" I.d. Round trailer tubes and allows the use of a padlock for theft prevention while maintaining a sleek oem apperance.