I use these for double duty: first for hitching trailers when I'm working solo. Second, I use them to help me back my single place pwc trailer down the ramp or into my driveway. They are magnetic so I just put them at the far corners of the trailer on the rails. They stand out really well, I can see them in my mirror just fine. $30. Great investment and time saver. Amazon has them too. They're called Hitchin Rods.