- Effortless Circuit Checks : This car circuit tester features sharp steel probes that effortlessly penetrate wire insulation, enabling quick circuit checks without the hassle of stripping wires or risking damage. - Versatile Probe Pen : Perfect for various applications including circuits, fuses, switches, and wiring in vehicles, trailers, boats, and motorcycles. This probe pen is an essential tool for both automotive professionals and DIY enthusiasts. - User-Friendly Circuit Testing : The attached clip allows you to easily ground the circuit while testing. An illuminated light on the pen confirms the presence of electricity, ensuring you can accurately diagnose issues. - Durable Construction : Crafted from robust ABS and metal materials, this test pen is built for longevity and reliable performance, meeting the demands of regular automotive electrical testing without compromise. Use Scenarios: 1. Quickly test vehicle wiring for faults before a long road trip to ensure safety and functionality. 2. Diagnose electrical issues in your motorcycle or boat, keeping your recreational vehicles in top condition. 3. Check wiring on trailers to ensure that all lights and connections are functioning properly before towing.