I have 4 holes in each ear, so I try to buy earrings in bulk. Over the years I have become allergic to a lot of the metals that are now used to make the posts. When I found these earrings I had to try them. I have worn them for about 4 months now and have not had any ear pain, swelling or redness. I have also found these earrings to be the perfect gift for my 7 nieces. They always want to change their earrings to match their clothes, so I bought them each a set of colored posts, these are the perfect jewelry for them.