This handy tool is a mechanic's best friend. With one tool you can check the integrity of vacuum-operated automotive components, bleed air from hydraulic systems, and siphon fluids. Thanks to a simply ingenious design, it creates both pressure and vacuum with a built-in gauge that ensures accurate results. Comes complete with a selection of fittings, hose, and a fluid reservoir. Powerbuilt tools are built with the performance, features, fit, and finish to satisfy the most demanding users.