The Magnum SPEL Electric Gooseneck Jack Converter, designed and manufactured in Ellington, Missouri by Magnum Lift Systems, is an innovative solution that transforms your SINGLE SPEED manual gooseneck trailer jack into an electric power jack, eliminating the need for manual cranking. This heavy-duty, time-tested electric converter is compatible with most common gooseneck trailer jacks, including brands like Bulldog, Holland, Binkley, and Ram, and is specifically designed for SINGLE SPEED jack landing gear. It's an easy upgrade that comes complete with a motor/gearbox, mounting brackets, a control box (switch), wiring harness, and detailed installation instructions, requiring only basic hand tools to install. Additionally, the converter features a manual crank backup shaft with a 5/16 inch hex head for use in case of battery failure and is capable of raising single or dual jacks. However, it is not suitable for 2 speed jacks. Each converter is backed by a 2-year factory warranty, ensuring reliability and satisfaction.