Not very easy to use
Understanding these are CZ's they are ok quality but they are full round studs, the picture looked more of a square setting.  The screw on backs to these are impossible to screw on! The screw on round backing is WAY to tiny and hard to hold between your fingers just to take a picture, not mention to do this behind your ear?!?!!  I dropped one of the backings on the first time and it rolled into a small crack or hole on my floor to a 4th dimension or black hole... to where I will never find again.  Save your money.
Rating: 2 stars