Ratcheting safety bar locks the jack if air pressure is lost. Single-handle control for automatic up, manual down. U.S.A. Lift Capacity (tons): 1 1/2, Min. Lift Height (in.): 8, Max. Lift Height (in.): 35, Operation: Air, Working Pressure (PSI): 90 - 150, Air Inlet Size (in. NPT): 1/4 1 1/2-ton capacity 3-way heavy-duty air valve Requires 6 CFM Lift pad spread: 36in. to 57in. Forward reach: 21in. 8in. diameter rear wheels