- Ignition tester tests spark plugs, spark plug wires, and ignition coils without puncturing the wire, enabling quick diagnostics without disassembly. - Portable pen clip design keeps the tool compact and easy to carry and store, delivering convenient on-the-go testing. - Wires and coils tester uses a pen clip form factor for easy handling; simple to apply and built to be durable and practical for regular use. - Coils pen features a grooved end that enlarges the contact area between the wire and instrument for more reliable readings. - Use scenarios: - On-site vehicle checks (cars or motorcycles) to quickly verify spark plugs, plug wires, and coils without removing components. - In-workshop pre-installation checks of new spark plugs, wires, and coils to confirm function before installation. - Field service for small engines (lawn mowers, generators) to diagnose ignition issues before parts replacement.