Features and Benefits: Tests for no-start conditions and for spark strength Adjustable gap allows for spark gap requirements from 0 to 40 000 volts Gauge background makes spark easy to see for accurate measurement Includes safety shieldWhen testing for a no-start conditions or spark strength be sure to have this tool handy. It works on ignition systems from high energy electronic automotive systems to small engines by simulating the spark plug under compression load. It s simple to use and easy to store.