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.