The tester can divide into two sections for testing. Sierra 18-99540 Engine Tools.
Sierra Spark Tester Tool #18-8960-1
In-Line Spark Tester with Coil-On-Plug Wire, Universal Fit, Engine Diagnostic To
Portable 6-12V Spark Tester with Nickel-Plated Design - Diagnostic Essential
Spark Plug Tester with Indicator Lights,Spark Tester Small Engine for Check
Spark Plug Tester with Indicator Lights,Spark Small Engine for 2PCS
