Product Details: Equip your semi to be Ready for the Road Ahead™, with the Bulldog 12.5" 12K Spring Loaded Sidewind Dropleg Trailer Jack, a crucial element that provides enhanced support for trailers. This replacement jack allows operators to park or mount a trailer, thanks to its extendable foot that protracts / retracts from a durable sleeve. Engineered with an easy-access gear box for simplified maintenance. FleetPride is your First Click in Heavy Duty®.