Attwood Corp Fold Up Trailer Jack - Fits 3in x 5in trailer tongue. Swings from vertical position to horizontal for a fast getaway. Spring loaded latch locks and releases the jack from one position to the other. Corrosion resistant zinc plated steel tubing. The single wheel version has a convenient sidewind handle, a tough 6-inch diameter polypropylene wheel, 1000 lbs capacity, 24in of height, and 10in of travel. The double wheel version has a convenient sidewind handle, two tough 6in diameter polypropylene wheels, 1500 lbs capacity, 26in of height, and 12in of travel.