- Universal Compatibility: This spark plug gap tool works with 10 mm, 12 mm, 14 mm, and 16 mm spark plugs, allowing you to measure and adjust the gap thickness for various sizes effortlessly. - High Precision: Achieve the perfect gap every time with the spark plug gauge. Simply place your spark plug on the tool for accurate measurements. - Expert Recommendation: For spark plug electrodes that tend to bounce back, it's normal for some models. If your desired gap is 0.44 mm, we suggest setting it to 0.42 mm to ensure a final gap of 0.44 mm after rebound. - Maintenance Tips: To prolong the life of your gapping tool, if it gets wet, use compressed air for drying and apply lubricant to maintain optimal performance. Use Scenarios: - Ideal for DIY mechanics performing routine spark plug replacements, ensuring optimal engine performance. - Perfect for professional technicians looking for a reliable tool to adjust spark plug gaps accurately. - Useful in automotive workshops for quickly setting gaps on various spark plugs, enhancing efficiency in service tasks.