These are hard to find. Glad you have them.
These look like the picture, and they function okay if you are very careful with the cup chain, but I'm not a fan. There is no catch at the back to keep the cup chain link from sliding out, so it's constantly sliding around as you try to get the tiny foldover tabs to fold down.
And those tiny foldover tabs are more difficult to fold down than the tabs on other cup chain ends I've used.
Also, because there is nothing keeping the cup chain from sliding backward AND it's hard to fold the tabs all the way down (especially while trying not to scratch the crystal, it's also difficult, if not impossible, to get a secure hold. Any time there is any pulling force on the cup chain ends, they slide off. I can't get a secure hold at all.
Also, the hole is so much bigger than it needs to be. It's giant, and when you have one on each end of a bracelet, it gets a bit ridiculous.