I needed clips to assemble a China Harbor Freight trailer I built but they were missing from the kit. This was the only product I found for my needs. Not only did they work well, but they fixed much better than Chinese clips. There is a small notch in the spring steel and it will bite the steel when inserted into the steel rail - you will never dangle with this design. The Chinese clips had no such tongue and looked like they could detach from the trailer's vibrations over time. I can buy a second pack to replace the ones that came with the trailer.