TPS 800 lb. capacity swivel mount trailer tongue jack has great features at an economical price. This bolt-on, zinc plated, swing away, side wind jack features a 6" diameter reinforced poly wheel (replaceable). Designed for use with marine and utility trailers. The 1:1 gear ratio provides fast, easy jack operation with over the 10" screw travel range. Includes all mounting hardware for quick attachment using common hand tools. Fits trailer tongues up to 3" X 5". A-Retracted = 12-3/4" A-Extended = 23" B = 10" C = 4" D = 6"