Topwind Square Tube Trailer Jack has 3,000 lbs. lift capacity and 5,000 lbs. support capacity. Jack has a 2-1/4 inch outer tube, 7.5 x 3.85 inch foot pad and solid-bar crank handle with claw knob. 15 inches of travel. Extended 39-1/2 inches. 24-1/2 inches retracted.