Trailer Jack Trailer Jack; TWL 150 X Jackpost; FEATURES: Trailer Jack Since 1920, the Bulldog brand has been the choice of military and manufacturers everywhere. For all heavy-duty towing needs, Bulldog is sure to deliver. Gooseneck hitches, gooseneck couplers, trailer couplers and Wedge-Latch elements feature a high-strength, heavy-duty design that makes them the toughest trailer components available today. Bulldog jacks in particular are built with uncompromising strength and materials engineered to hold up under rigorous working conditions. The Bulldog line is characterized by unmatched strength, reliability, safety and value. For your heavy-duty towing needs, count on Bulldog to be Tough and Tested.