1. Metric and Imperial Dual Reading: Our spark plug gap tool is specially designed to clearly display two measurement methods for easy use.
2. Accurate and easy to read: Classic type. The scale range of this spark plug gap gauge is 0.020 to 0.100 inches, and 0.6 to 2.4 mm for metric
3. Key ring hole: There is a small hole on the spark plug gap tool, you can string it on your keychain for easy carrying
4. Adjuster: This tool can also be used as an electrode adjuster when measuring spark plug gap; to widen the gap, use the small hole on the top of the coin gauge to pull up the metal; to narrow the gap by pressing the metal against the tool