Features: 1. Universal Diagnostic Detector: This spark plug tester is designed to diagnose the fault of any engine with a spark plug. 2. High Accuracy: Inline spark tester can diagnose ignition or engine issues, including problems with the fuel delivery system, quickly and easily. 3. Easy Operation: Connect the metal end of the tester to the spark plug coil and start the engine. If the ignition system is functioning, the indicator will light up. 4. High Reliability: This ignition coil test tool helps save time and effort while providing a safe and secure way to confirm spark presence. 5. Long Durability: Constructed from high-quality ABS and metal materials for long-term durability. A must-have tool for individuals, professional mechanics, garages, and auto shops. Specification: Item Type: Spark Plug Tester Material: ABS + metal Process: Electroplating Color: Bright silver Fitment: Universal for car