Essential for use with any tandem-axle trailer. Lets you change flat tires, often without unloading. Simply drive trailer onto tandem jack, nestling good tire in the 'scoop' and raising the flat tire off the ground. Traction teeth keep it in place while feet stabilize it on the ground. Durable and strong with 5 1/4in. lift. For trailers with regular torsion bar suspensions up to 14,000 lbs. loaded, and leaf or slipper spring trailers up to 8,000 lbs. loaded. Measures 33in. L x 5 1/4in. H x 7in. W.