Spark plug gap scale - Dual scale gauge with inch and metric readings: the scale range is 0.02 to 0.1 inches on one side, and the opposite side provides metric measurements from 0.6 mm to 2.4 mm. - Accurate and easy to read: gaps tools are accurate and easy to read with measurements from 0.02 inches to 0.1 inches. - Simple structure with flexible design: wire plug gaps tool features a simple structure, easy to use, and a flexible design you can rely on. - Easy to operate with a scientific design: spark plug gaps gauge has a simple structure and scientific design, making it easy to operate and providing a straightforward measuring method. Use scenarios - Before installing a spark plug, use the gauge to verify and set the gap to the engine specification. - During routine maintenance for vehicles or small engines, check and adjust plug gaps to maintain ignition efficiency. - In a workshop or DIY setting, carry and use the tool to quickly verify gaps during plug replacement or tuning tasks.