The Fisher & Western 29052 is a genuine plug-in headlight harness kit specifically designed for certain vehicle applications with HB-3 and HB-4 headlights. This complete kit is essential for properly connecting your snow plow's lights to the truck's electrical system, ensuring safe and functional operation. It includes harnesses 26357 and 28924, along with adapters 29047 and 22381, providing all the necessary components for a seamless installation.