• Specialty spark plug tester tool designed to connect between spark plug and high tension lead or coil to enable quick and easy ignition spark testing and problem diagnosis • Effective way to diagnose ignition faults in petrol engines on vehicles including motorcycles, lawn mowers, plant engines, etc • Heavy duty transparent tube illuminates when spark is detected providing real time ignition • Safe and easy to use and prevents shock from ignition system • Overall length: 265mm • Lead length: 110mm • Probe length: 50mm