- Quickly diagnose weak spark issues in minutes with this simple-to-use tool, ideal for no-start conditions. - Features resistance settings of 10k, 20k, 30k, and 40k ohms, with clear white lettering for easy reading of measurements. - Easy operation: Ground the clip to the engine, connect the other end to the spark plug wire, and observe the spark length through the viewing window. A longer spark indicates a stronger coil. - Compact dimensions: Length: 115mm (4.53in), Diameter: 22mm (0.87in), Cable Length: 520mm (20.47in), Weight: 96g (3.39oz). Applications: 1. Ideal for automotive technicians diagnosing ignition problems in vehicles. 2. Perfect for DIY enthusiasts troubleshooting spark-related issues in lawn equipment or motorcycles. 3. Useful for inspecting and maintaining performance in classic cars or vintage engines. This diagnostic tool is an essential addition to your toolkit, providing reliable spark assessment for a variety of applications.