Utilizes over 140 chrome-moly steel ball bearings in a dual circuit configuration, providing a redundant fail-safe system that insures strength and reliability. Precision, polished, black oxidized, alloy steel screw provides smooth, easy operation. Lifts 1,900 lb. per jack. It is the only quick release jack that can operate with an electric option making leveling your camper quick, simple, and stress-free. Features square 2", powder- coated inner and outer tubes which are stronger than round tubes and protect against rust. Concave footpads reduce movement and provide maximum stability. Z-bracket mounting system, which is easily installed and/or retrofitted onto most campers. Can be easily upgraded from manual, hand crank jacks into a remote controlled electric jack system with the purchase of the Electric Motor Drive Assembly Kit (94-5002) and Electric Wiring Kit (94-5003). This is a special order item and is not stocked in our store. Please call for availability.