- Dual-hole simultaneous testing The ignition coil tester tool allows simultaneous testing of two spark plugs, enabling quick comparison and diagnosis of ignition issues in multiple cylinders. - Adjustable working frequency The spark plug tester provides an adjustable frequency range up to 6000 RPM, accommodating different engine types and conditions to ensure accurate testing across various vehicles. - ABS protective cover design The tester features a robust ABS protective cover that shields users from potential sparks and debris during testing, enhancing safety and reliability. - Durable construction Built with high-quality plastic and metal components, delivering durability and longevity even under rigorous use in professional automotive environments. Practical applications - Shop diagnostics Use dual-hole testing to compare ignition performance between two spark plugs at once, quickly identifying misfires or weak coils across cylinders. - Multi- vehicle servicing Use the adjustable frequency up to 6000 RPM to tailor testing for different engine types and operating conditions, ensuring accurate results during service. - Field and safety-focused testing Rely on the ABS protective cover to protect the operator from sparks and debris during testing in various environments.