The Air/ Hydraulic Bottle Jack is designed to operate either manually or pneumatically. The manual function allows for normal operation anywhere, even without an air supply. Ideal for lifting heavy-duty machinery, industrial construction equipment, farm vehicles, and more Designed for operating either manually or pneumatically this jack is constructed of heavy-duty steel. Fully polished and chromed cylinder rams enhanced with high-performance seals. Push-button trigger control increases speed and efficiency, reducing lift time. Manufactured with precision for quality and ...