This Hein Werner Truck Jack with a 20-ton capacity features a lifting height from 9-1/2? to 17-1/2? with 90-150 psi of air. This jack includes a 50"-long handle, a 2-1/2? extension screw to permit height adjustment, large rubber wheels to make maneuvering easy, and an automatic valve to prevent overloading. This model also includes Hein Werner's patented Speed Pak feature to provide quick, effortless lifting, and a pneumatic power raise of 5-1/2" is standard.