Check the listing for details. (2) Spark Plug Tester in-Line Pick Up Coil 6-12v Engine Ignition Diagnostic Set. Condition: New. Listed at 9.99 USD. Simple Operation: You just need to Connect the metal end of the tester to the spark plug coil and start the engine. If the ignition wire is intact, the indicator lightVersatile: Works with all vehicles that have a spark plug, even small engine tools; Car, motorcycle, lawn mower, boat motor, chain saw, and moreWhen engine won't start, gives instant answer to 'does it have spark?' - Saves time, frustration and money while also offering a safe secure way to identify sparkMUST HAVE: When engine won't start, gives instant answer to 'does it have spark?' - Saves time, frustration and money while also offering a safe secure way to identify sparkUSE FOR: Essential Troubleshooting for All Internal & External Combustion Engines, cars, trucks, motorcycles, lawnmowers, chainsaws, trimmers, snow-blowers, generators etc. - A must have for any individual, professional mechanic garage and auto shop