The crazy thing is that I stocked up on these maybe 3 years ago. So really, I have been using them from the same batch for years, and this is the first time I have had one fail like this. The split rings weren't oblonged before this happened. I tied a new one on to run a dipsy and pulled on it to put tension on that split ring, and same failure, not even 10lb of tension and the split ring opened up pulled right out of the swivel. Good thing I checked it before getting that dipsy wet!!

Wakina, you are spot on. I'm not sure where the Danielson swivels rank, but I'm not one to cheap out on my setups at all. I will look into and likely stock up on the spro brand if they come recommended from you.