Avoid accidents and tickets by installing the Black Bull 12 Volt magnetic towing light kit. No permanent wiring to install or holes to drill, the scratch resistant magnetic base mounts easily to any vehicle, stays put when on the road, and can then be easily moved when you reach your destination. This set of high visibility safety lights plug into the trailer with a standard four-pin connector. A 20 foot wiring harness lets you tow cars, boats, trucks or trailers up to 80 inches wide.