Another thing I like about the ultra swivel is that my anchor Manson Boss has that slot arrangement that I am not really sure about, so its design prevents the attachment point from sliding up the slot which I prefer in an area of strong tidal runs when it changes.
When you rest the chain side of the swivel on the bowroller it just smoothly allows the pick to rotate to the right side up and bingo she comes aboard.
As far as strength goes it sure appears to be a beautifully made peice of kit...priced accordingly!