While the swivels spin well and hold up very well, I have encountered a problem with the welded rings parting from time to time. So far I would say 25% have failed in that fashion. I,m using a #2 size and the rings often appear to be cold welded. Usually it is either one ring or the other. Since I use these in conjunction with wire leaders I can still use the swivel by twisting the eye of the leader on the end with the broken ring removed and then pull real hard to make sure the other one doesn't break as well. I don't know if I got a defective batch or this situation is characteristic to the "deluxe" grade. Time will tell.
These are a good product. IF and that's a BIG IF they are in stock. I gave them a poor rating for this reason. I found them in stock at the store but not online. I waited 6 months last year and finally cancelled my order.