Failed to load media. I bought a welder and built a power rack with dumbbells for my son. Watch the video but don't judge my welds - as long as it works lol. In any case, the end of the pipe I used was sharp and I didn't want to weld and grind the ends of the pipe to make them flush. I found these stubs and decided to give it a try. They were exactly what I was looking for. They work great and give it a "professional" look.