Backing my trailer into the tight driveway used to be a two-person job, but that 40-inch yellow fiberglass pole gives me a clear target to line up in the mirror. The clip holds it steady and the bright color is easy to spot even in low light.
That 40" yellow pole makes backing my trailer into tight spots way less stressful, I can actually see the rear corners in my mirrors now. The fiberglass has held up fine after a few months of sun and rain.