The AFF Viking 22-Ton Air Assist Truck Axle Jack, No. 56220, is a fully welded hydraulic unit for maximum durability and leak-free operation. It features a narrow chassis design that fits easily between tandem wheels. Its jumbo wheels provide effortless travel, even on rough terrain, and its release valve allows operation with the handle in any position. It also features a long handle that allows easy access to truck lifting points and a built-in safety valve to prevent accidental overload. The axle jack meets 2014 PASE/ASME Standards, has a minimum height of 8-1/4", and a maximum height of 17-3/4".