XtremepowerUS Deluxe Vacuum Testing Brake Bleeding Kit Idea for Testing Vacuum-Operated Components (Door locks,Actuators,etc...) Engine Mechanical Testing (Valves, Cam timing, Head Gasket, etc...) Brake And Clutch Hydraulic System Bleeding Measurement Of Vacuum Supplied By Boosters Reservoirs Solenoids Or The engine 0-40 inches Hg, 0-101 cm Hg