Wide Application - Designed for all 12mm 14mm threaded spark plugs. Package includes 1 x 12mm spark plug gap tool (blue) and 1 x 14mm spark plug gap tool (black). Not for short reach type spark plugs. Not for open up the gap, but only use to close

Perfect Performance - With the spark plug gap tool and feeler gauge, you can more precisely to adjust the spark plug gap and properly replace the old or damaged spark plug to improving vehicles' performance and efficiency ( Not fit lawn equipment spark plugs )

Simple Operation - Easy to adjust only by screw the knob rather than using hammer, the spark plug gapping tool assures you a more precise gap and greatly reduce electrode damage. No more spark plug wire marks or nicks so as to optimal spark plug and engine performance

Reliable Material - Spark plug gapper is made of high quality Aluminum Alloy with Matte Anodized coating, which can prevent the spark plug tool from corrosion and rust, wear resistant and durable, ensures long-term reliable use

Operation Tips- Some spark plugs electrode will spring back when using spark plug gap tool to close the gap, so to use a feeler gauge in 0.001-inch smaller than the target gap is recommended when using this spark plug tool