Spark Plug Tester Ignition System Coil Engine in Line Auto Diagnostic Test Tool

Description: 100% brand new and high quality Material: aluminium Color: Black Must-have diagnostic tool for any engine with a spark plug When engine won't start, gives instant answer to 'does it have spark Simple to use - just remove rubber boot from spark plug, insert tester & place tester boot on plug Turn the engine over - if ignition is being sent to the cylinder, light in tester glows Great time and frustration-saver with cars, motorcycles, boats, chainsaws, lawn mowers & more Size:29.3cm/11.54"