The Astro Pneumatic 5304A 20 Ton Low Profile Air/Manual Bottle Jack is designed for operating either manually or pneumatically. The air hose can swivel in any direction of connection from the air source. This item is fitted with a safety valve to prevent against overloading, and the extension screw gives added height when needed. This item is speedy and versatile, and since it is a hydraulic bottle jack, it is far quicker than using conventional hand operated equipment. It is also much safer since air power permits one-handed operation and enables the user to watch the load more closely. The heavy duty design makes this item ideal for a wide variety of automotive, truck, industrial, and construction work.