Keep all engines, from your car to lawn equipment, running smoothly with the Spark Plug Gauge. Gapping spark plugs is an essential part of every tune-up and this tool makes it easy. Check the depth of the gap between the electrode and ground strap by sizing it against the gauge, which ranges from 0.020" - 0.100". Use the adjustment hole to gently open or close the gap. This handy tool will keep your engines running at peak performance for years to come.
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