Auto Car Test tester Ignition Spark Indicator Spark Plugs Wires Coils Diagnostic Tool fit to all carItem specificsItem Type:Engine CareBrand Name:newSpecial Features:Ignition TestersMaterial Type:plasticDescriptionSpark Indicator -Tests Spark Plugs， Spark Plug Wires and Coils Without Puncturing the Wire.With the engine running， place the grooved end of the tool over the plug wire.The bulb will flash to indicate sparkExcellent for the Professional or Shadetree Mechanic! Package content:1 x Spark Indicator