The Edward Tools Spark Plug Gap Gauge is a reliable and durable tool for accurately measuring and adjusting spark plug gaps. Made from high-quality zinc alloy with a chrome-plated, rust-resistant finish, this gauge ensures long-lasting performance in any automotive setting. Its tapered edge design allows for quick and precise gap measurement and adjustment within a range of 0.02 to 0.1 inches. Compact and easy to carry at just 1-1/2 inches in diameter, this tool is perfect for automotive enthusiasts, mechanics, and DIYers looking to ensure optimal engine performance.