Dual Hole Spark Plug Tester – Car Engine Diagnostic Tool 60 meter waterproof Convenient Storage: Neatly organized in

Convenient Storage: Neatly organized in a 6-compartment box so you never lose a single piece

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nylon coil zippers can be carefully trimmed to a shorter length

True to Size Fit: Fits just right — no need to size up or down

Dual Hole Spark Plug Tester – Car Engine Diagnostic Tool 60 meter waterproof Convenient Storage: Neatly organized inTest Your Spark Plugs in Seconds Never Guess Again Diagnosing a misfiring engine or rough idle just got easier. This Dual Hole Car Spark Plug Tester lets you quickly check spark plug performance and ignition strength right on your workbench no expensive shop visits required. Simply plug in two spark plugs side by side, power it on, and instantly see which one is firing strong and which one needs replacing. Made in Mainland China. Key Features Dual