Adjustable Ignition Spark Tester from 0 to 40,000 Volts

• Works on ignition systems from high energy electronic to small engines. 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 easier to see for accurate measurement. Alligator clip securely fastens to ground. Screw assembly adjusts spark gap quickly and easily. Now includes safety shield.