this review title is: beware and the content is: 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 so they address the dreaded earring droop however i placed the second pair comes with 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.there are other information for this review, one is this reviewer did purchase it and the other is 4 people think this review is helpful.