The JQ-3500-7P electric tongue jack boasts a maximum lift capacity 3,650 lbs.; Powered by the running light circuit of a 7-way adapter 2.25" post diameter is the standard tongue jack size, making it easy to install into existing jack mounting holes Electrical components and heavy-duty steel gears sit beneath the clean, sleek plastic housing Each JQ-3500-7P jack includes a manual crank override, bubble-style leveling cap, LED work light, and a heavy-duty weatherproof vinyl cover One-year no-hassle warranty