Lifts and lowers a 1 1/2-ton load from 8in. to 35in.!! Ratcheting safety bar locks the jack if air pressure is lost. Single handle control for automatic up, manual down. 3-way heavy duty air valve. Attaches to 1/4in. quick-connect air supply. Lift pad spread: 36in. to 57in.. Forward reach: 21in.. 3000-lb. lifting capacity. 8in. diameter rear wheels. Working pressure 90 to 150 PSI.