I use the large spring ring in my necklace it was easier to use for an elderly family member to put on by herself.
It's a hit or miss with these
I really like these spring ring clasps because of their appearance and size, but quality-wise they could be better. I've had some hold for months or more, while others fell apart the day after they were attached to a piece of jewelry. You really need to check them before selling a piece of jewelry with them, or your customers might have some complaints. What happened with mine was that the lever part (the part you press down to open the clasp) came completely out of the ring. Some of them appear to be perfectly fine, though, I don't know what it depends on...
I only purchase these from ArtBeads
So I have been through many-a-Spring Ring in my time. I have learned through time to only purchase them through ArtBeads. These rings are consistent in their value and performance. They are sturdy and ready for action, in addition to beautiful and bright :)
My only complaint is that one out of maybe every 20 of these clasps doesn't fully open. Either the prong to open it is stuck or the barrel of the spring ring is bent.