Convenience push button operation. Permanently lubricated, carefully designed to provide years of trouble-free use. They require little maintenance and use a rugged 12VDC electric gear motor that has been proven in years of use under adverse conditions. Heavy duty 1-7/8" tubing and a sturdy foot pad provide greater trailer stability. The lightweight Power Jack is specially designed for smaller trailers with a 2" coupler and can lift 1,500 lbs.