Feature: 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. Specification: Item Type: Spark Plug Gap Tool Material: Aluminum Fitment: Suitable for Most 10mm 12mm 14mm 16mm Spark Plugs. Package List: 1 x Spark Plug Gap Tool 1 x Adjustment Screw