Accurate and easy to read: the scale range of this spark plug space gauge tool includes 0.040, 0.044, 0.045, 0.050, 0.060, 0.080 inch, and the metric sizes are engraved on the back for clear reading, easy to read space adjuster: the spark plug space tool is located on both sides of spark plug space gauge, which can adjust spark plug space, you can target the tool's slot into the hook of spark plug and pull slightly to make adjustment Solid construction: our spark plug space gauge measuring tool is made of metal, which is durable and reliable to use, solid construction allows for strength and durability, built for resilience and flexibility, engineered to measure clearances of spark plug space size Easy to store: the space adjustment tool measures approx. 1.9 inch/ 4.8 cm in diameter and are packed in a plastic storage box for easy storage, proper size to use and convenient to store when not in use What you receive: there are 2 pieces of wire spark plug space gauges in this package, enough quantity to meet your daily use and replacement, will bring much convenience to you in everyday life