Quality Construction Built with durable hardness plastic housing that resists breakage and ensures longlasting use. Internal wiring made from pure copper for conductivity and the ability to withstand voltage currents. Stainless steel head for secure, reliable connections and exceptional wear resistance over time. Clear Visual Ignition Feedback Equipped with a bright neon light indicator that flashes when the ignition wire is functioning correctly. Bulb remains cool even after extended operation, supporting long service life. Builtin card core design for quick and straightforward usage. Versatile Compatibility Suitable for diagnosing ignition performance in any engine that uses spark plugs. Works with internal and external combustion engines including cars, trucks, motorcycles, lawn mowers, and more. Ideal for mechanics, DIY enthusiasts, and anyone needing to quickly troubleshoot ignition systems. Reliable Diagnostic Function Accurate tool for testing and identifying spark plug and ignition system faults. Allows fast assessment of spark plug condition to maintain smooth engine performance and prevent misfires. Example Applications 1. Automotive shops can quickly check ignition issues in customer vehicles without disassembly. 2. Home users can diagnose lawn mower ignition problems before replacing parts. 3. Motorbike owners can confirm spark plug functionality after tuneups or seasonal storage. Specifications Material: hardness plastic housing, pure copper internal wiring, stainless steel head. Indicator Type: brightness neon bulb with cool operation. Suitable for: All spark plugequipped internal and external combustion engines. Function: Inline connection for ignition performance testing and spark verification. This inline spark plug engine ignition tester is a dependable, easytouse tool for quickly diagnosing ignition system performance, helping ensure your engine runs smoothly and efficiently in a wide range of applications.