This Hein Werner Truck Jack with a 20-ton capacity features a lifting height from 9? to 19-3/4? with 90-140 psi of air. This jack features a compact, powerful design to quickly lift its rated capacity, with a low height that allows lifting from the axle or suspension. This model also features rapid two-speed air-hydraulic action to quickly advance the ram to the load, and both the chrome-plated plunger and specially-coated ram prevent rust and extend jack life. This jack includes a 45"-long handle, a 4-3/4? extension screw to permit height adjustment, large rubber wheels to make maneuvering easy, and a pressure relief valve to prevent overloading. A power raise of 6" is standard on this model.