In good quality.
Tester Length: Approx. 11.5cm
Tester Diameter: Approx. 2.2cm
Cable length: Approx. 52 cm
According to spark color and flash over distance to determine the quality of the coil.
Can intuitively convenient to understand the operation of the ignition coil.
Alligator clip securely fastens to ground.
Screw assembly adjusts spark gap quickly and easily.
Avoid fire, the ignition coil burned out and so on.
1 x Adjustable Ignition Spark Plug Tester Diagnostic Tool