Works for my purposes. Sterling silver, quality.
These settings not only work great for CZs but genuine gemstones also. I would love to see oval and square mountings in the future!
I purchased the earring backs for an existing pair of earrings belonging to my wife. She was very pleased with them. She can now wear her earrings.
I ordered a bunch of these to go with STG-BALLEAR4 the Sterling 4mm Ball Post Earring. I found that they do work well, but I have to test them out on a pair and swap backs around to make sure there is a good 'catch'. However, I wouldn't be confident that things would work if I only ordered two.