1、Multifunctional Design: Easily adjust spark plug gap with the aluminum gap tool, suitable for most standard spark plugs sizes of 10mm, 12mm, 14mm, and 16mm. 2、Convenient Usage: Simply place your spark plug onto the spark plug gapper tool, use your desired feeler gauge, and adjust the knob to your desired gap thickness accurately and efficiently. 3、Accurate Adjustment: The spark plug gap adjustment tool is specially designed for spark plugs that spring back when adjusting the gap, achieving precise gap targets easily by using a slightly smaller feeler gauge than the target gap. 4、Sturdy Construction: Crafted with a matte textured aluminum material, the spark plug gapping tool ensures long lasting performance for various spark plug sizes, resisting wear and tear. 5、Compact and Portable: The universal spark plug gap tool is compact and lightweight, easy to carry and store, convenient for automotive repair anytime, anywhere. Item Type: Spark Plug Gap Tool Material: Aluminum Fitment: Suitable for Most 10mm 12mm 14mm 16mm Spark Plugs 1 x Spark Plug Gap Tool 1 x Adjustment Screw