BETOOLL 15pcs Compression Tester with Spark Plug Tester & 14mm&16mm Magnetic Swivel Spark Plug Socket - 300PSI Engine Cylinder Compression Gauge 汽车用品 Tool

The engine compression tester kit is used to test the pressure of petrol engines to help determine cylinder problems, not applicable to crude oil engines.Specifications 3/8" driver 14mm&16mm magnetic rotating spark plug seat adopts 12 point design. Features a unique bump design that enhances grip friction and allows you to remove spark plugs more easily.The swivel head firmly grips the ratchet, and the top holds the spark plug to ensure it is securely held in place during installation and removal without worrying about losing the spark plug.The thin-walled design makes it compatible with BMW, compatible engines and various MINI models such as R55, R56, R57, R60, etc.The 15pcs compression tester kit comes with 10 different connect adapters, widely suitable for most types engine cylinder such as car, ship, truck, lawn mower, ATV, boat and so on.