- High precision: the spark plug spacer gauge measures and adjusts spark plug gaps with accuracy, helping you find the most suitable distance for your engine. - Easy to read: metric and imperial readings are printed on the spark plug gap opener surface for clear visibility. - Deformation resistant: made of heat-treated spring steel wire for high hardness and high resistance to deformation with frequent use. - Durable and corrosion resistant: chrome plated round shell provides wear resistance and rust resistance for long-lasting performance. - Compatibility and performance: designed to work with standard spark plugs used in cars, motorcycles, and many small engines; built for reliable, long-lasting operation. - Use scenarios: - Automobile maintenance: during spark plug replacement on a sedan, quickly set and verify the gap to specification. - Motorcycle service: adjust spark plug gap for a sport bike or scooter to ensure reliable starting and smooth idle. - Small engine upkeep: lawn mower, generator, or power tools after cleaning or re-gapping to ensure proper performance.