Spark Plug Gap Tool for 10-16 mm Plugs - Improved compatibility to prevent damage Designed to fit 10 mm, 12 mm, 14 mm, and 16 mm spark plugs. Not suitable for 18 mm threaded plugs or long reach plugs. Please verify compatibility for your application. - Safe to use with durable construction Built with a robust and wear resistant design from strong materials that resist breaking. Provides safe operation and a durable construction to support reliable performance and engine efficiency. - Increased efficiency through precise measurements The tool features precise measurements and an efficient design to ensure easy installation and optimal engine performance, saving time during vehicle maintenance. - Lightweight and portable Compact and easy to transport, the tool fits comfortably in the hand and takes up little space. Take it anywhere to maintain peak vehicle performance. - Practical use scenarios 1) Routine spark plug maintenance in a home garage on cars using 10-16 mm plugs. 2) Professional shop settings during tune ups or repairs that require quick, reliable plug gap verification. 3) Field service for small engines or equipment (such as lawn mowers or generators) where portability and compact size are advantageous. - Key attributes Function: spark plug gap/tool alignment support; Compatibility: 10, 12, 14, 16 mm; Size range: 10-16 mm; Material: strong, wear resistant; Performance: precise measurements for easy installation and engine efficiency. Not compatible with 18 mm plugs or long reach plugs.