General description Adjustable Spark Plug Tester is an essential tool for diagnosing engine ignition issues. It checks for missing ignition status and allows users to intuitively understand how the ignition coil operates. The tester provides a clear reading with visible white inscriptions that help in measuring deviation effectively. By observing the color and distance of the spark, users can assess the quality of the ignition coil. Technical specifications Material: Metal Diameter: 22mm Length: 115mm Package includes: 1 x spark plug tester Usage Identifies dirty spark plugs, faulty points, and bad wires. Prevents the ignition coil from igniting and burning out. Features alligator clips for secure grounding. Installation Assembly with screws for quick and easy adjustment of the spark gap. Other information Please allow 1-2cm difference due to manual measurement. There may be slight differences in color tone between the pictures and the actual item.