I broke off the upper bolt on my old trailer hitch. This kit was just what I needed to fix his installation, but it wasn't easy at all. Make sure you have a drill and tap to remove the bottom pin. The instructions make it sound like it can be pulled out without breaking, but I don't see how. After working slowly for about 10 minutes, the head finally broke off and I had to drill it out. After that, the installation of the new set took 5 minutes and was easy to complete.