The ATS Spark Plug Cleaner and Tester is the perfect choice for anyone who needs to reliably and accurately check the quality of used spark plugs. Aircraft Tool Supply is the sole distributor of this highly efficient product. Recently, they have equipped the cleaner and tester with both 120- and 220-volt sources and advanced circuitry to prevent thermal overload during heavier use. The cleaner section uses a powerful blast of air and abrasive to thoroughly remove carbon deposits from plugs. The recessed observation mirror is perfectly angled to display the electrode of the spark plug so that you can clearly judge the quality of the spark as the plug is being tested. For more information visit www.aircraft-tool.com or call (800) 248-0638.