Universal fitment:the spark plug gapper is Universal for 10mm 12mm 14mm 16mm Spark Plugs. Used your desired size feeler gauge for gap thickness.
Effort Saving: Spark plug gapping tool allows you to adjust the gap with less time and effort.Simply place the spark plug onto the spark plug gapping tool and select your desired feeler gauge thickness, then screw the knob slowly till the side electrode compresses to the desired gap thickness
Package include:1 blue spark plug gap tool;1 feeler gauge
Adjustment Tips: For normal physical phenomena, some spark plugs electrode will spring back when adjust the gap. You are suggested to use 0.028in feeler gauge size if your desired gap is 0.003in, smaller scale than the target gap is recommended
Precision work:This Spark Plug Gapping Tool will give you that perfect gap every time. Simply place your spark plug onto the gap tool perfectly.