STUDEX ear studs are the best-selling ear piercing studs worldwide. This fact reinforces our determination to produce our ear studs with the highest possible precision and quality. Ear piercing studs are available in many styles. Each stone is set in Allergy-Free stainless steel All earrings exceed all F.D.A / E.C requirements. Earrings are sealed and sterilized in individual packages. It Comes with Butterfly Earrings backs and is a grooved friction post for secure fastening.