Automotive ignition testers: high-brightness bulb provides clear, easy-to-observe spark and measurement results for quick diagnostics. Relay tester: suitable for electronic ignition systems and circuit breakers; designed for convenient, reliable use in automotive diagnostics. Small engine tools: built with workmanship, durability, and precision to ensure stable performance during ignition testing. Spark tester for small engines: grooved end enlarges the contact area between the wire and the instrument for accurate testing; also serves as an automotive relay tester. Use scenarios: - Diagnose car ignition systems by verifying spark from coils, modules, and wiring. - Maintain small engines such as lawn mowers or generators by testing spark plug wires and ignition circuits. - Troubleshoot electronic ignition systems and circuit breakers to confirm proper spark delivery and wiring integrity.