Here are six pairs of earring backs.
These are not just studs or clasps which do nothing to support your ear and which you may develop a metal allergy to.
They have a built in plate which separates your ear from the metal part protecting from allergic reaction to the metal
This plate also holds the earring in place, spreading weight so the pull is not all on one point.
Because earring or stud is held, rather them being just loose in your piercing, the show or display is more attractive.
As you can see you will be supplied with 3 pairs gold matching, 3 pairs silver matching.
As you won't see, some charge a lot for just one pair of earring backs, while we charge little for six pairs, which can be viewed as a better design and solution.