Simple to use just remove rubber boot from spark plug, insert tester & place tester boot on plug. Must-have diagnostic tool for any engine with a spark plug. Turn the engine over if ignition is being sent to the cylinder, light in tester glows.
This product would be ideal for automotive professionals, DIY mechanics, or enthusiasts who need to diagnose and repair ignition plugs for a variety of vehicles that use a 12V power source.
