At Trailer Gearbox, we know trailers. We have owned, maintained, and worked with hundreds of trailers across real hauling, equipment, and trailer-based businesses. We built Trailer Gearbox because we saw the same problem over and over again: hand-cranking a trailer jack SUCKS! It is slow, frustrating, and physically demanding. Now with Trailer Gearbox all you need is a cordless drill for effortless trailer raising and lowering.