The Thexton Extended Small Engine Spark Tester, No. 862, is designed for small engines and has a long lead. The third "grounding pin" allows the spark to jump the gap in non-battery applications, the company says. The black backdrop lens allows for more visibility of spark. This tester works on most two and four stroke small engines. The product has an extra-long ground wire to provide the option for more grounding locations. Hook and loop tape is included for allowing the tool to be strapped facing the user.