Review (2/5): BEWARE!
Delivered quickly, these are terrific at keeping my studs firmly in place. I use them on my screw back diamonds. Bonus is the backs measure about 10mm, so they address the dreaded "earring droop". However, I placed the second pair (comes with 2 sets) on my secondary piercing studs, which have a small indentation at the end of the posts. They are now stuck on! So, a helpful product, but BEWARE.