12V Car Tester Auto Ignition Spark Plug Coil Test Pen Detector Diagnostic Tool Product Features： High quality insulated handle, Safe and reliable. Used to test spark plugs, coils and breaker. High-brightness bulbs and transparent observation windows make test results easier to observe. The end with grooves makes the contact area of the wire and instrument larger and the test results more accurate. It is more convenient to carry and use without any cables. It is an essential tool for automotive inspection and maintenance. Product Specification： Type：Ignition Spark Tester Vehicle Type：Passenger Vehicle Special Features：Automotive Spark Indicator Voltage：12V Material：Aluminum Length：12.2 cm/4.8 in Diameter：1 cm/0.4 in Product Weight：30g Package Included： 1X Spark Tester