Keep all engines, from your car to lawn equipment, running smoothly with the Craftsman 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 in. – 0.100 in. 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.
Versatility: Quickly gauge spark plug gaps from .020 in. to .100 in. (.50mm to 2.53mm)
Ease of Use: Tapered hole is designed to adjust spark plug gap without damaging the electrode
Model: CMMT14102

















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