Click to expand Tap to zoom Lisle, Spark Plug Gauge / Gapper Tool by Lisle Save £-6.16 £6.16 | / SKU MCS530846 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart DescriptionLisle, spark plug gauge / gapper toolDetailsFor electronic ignitions; Measures .040 to .080" (1.02mm to 2.03mm); built-in gap tool Used to correct and measure spark plug gap. Comes with two built-in electrode adjusting tools. Measures 0.040" to 0.080" (1.02mm to 2.03mm).