Performance Tool W86554 Inline Ignition Spark Tester<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Easily connects between the spark plug and spark plug wire.</li><li>With the engine running， the tool flashes a mirror image of ignition spark.</li><li>Quick and easy test helps check the condition of the ignition system at each cylinder.</li><li>Troubleshoot dirty spark plug connections， defective points， bad cables or connections， and more.</li><li>Shows voltage to plug， a stronger voltage will create a brighter light.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31HjK1sfjfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51w2pQZh9JL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/414U-LOiNHL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41i2%2BUysN9L.jpg" noproxy>