I used the two swivels daily for work for about four years. I used the other three occasionally. All five can be used without any problems. I think you can tell what they are to some extent from the appearance, but feel free to comment if you don't know. I can sell them individually, but I will calculate it at 10,000 yen per swivel. Please comment if you want to buy them individually. Please specify which one you want to buy, such as "the [number]th from the right" or "the [number]th from the left" in the first picture.