The Tracer Cobra and Cobra-Plus lights feature white and UV LED lights that enable hard-to-see components without disassembly. Tracer says the UV LED is ideal for detecting leaks in fuel systems, radiators, A/C evaporators and EVAP systems, while the white LED is designed for inspecting components such as pistons and intake valves. The TP-9350 Cobra has a 10-mm, 24-in. shaft, while the TP-935036 Cobra-Plus has a 10-mm, 36-in. shaft for inspections requiring additional reach.