Ketofa Rampro Fool-proof Engine Ignition Spark Tester<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Must-have diagnostic tool for any engine with a spark plug</li><li>When engine won't start， gives instant answer to 'does it have spark?'</li><li>Simple to use - just remove rubber boot from spark plug， insert tester &amp; place tester boot on plug</li><li>Turn the engine over - if ignition is being sent to the cylinder， light in tester glows</li><li>Great time and frustration-saver with cars， motorcycles， boats， chainsaws， lawn mowers &amp; more</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lOtO4xb4L.jpg" noproxy>