* This versatile kit provides a quick method
   to obtain cylinder compression pressure
   on engines with deep, recessed spark
   plugs and difficult access.
* A special air-hold valve is included for easy
   resetting of the gauge, which is graduated
   from 10 to 300 psi (0 to 21 bar).
* Gauge assembly includes pressure
   relief valve.
* With M10, M12, M14 adapters suitable for
   cars and motorcycles.