Description Screw Middle Hole: Come with a screw design, the hole of these earring backs, which is suitable for most of regular screw stud earrings . High Hardness and Gloss: Made of premium Sterling Silver material, all our stud earrings have high hardness and good glossy. It is not easy to oxidize and fade, satisfying your needs of daily wearing . For Almost All Sensitive Ears: Our beautiful silver earring backs are perfect for most of the people with sensitive ears. The formula does not contain any harmful ingredients, nickel-free, lead-free, cadmium-free and hypoallergenic . Prevent Loss of Earrings: Whether its for earrings DIY, a replacement for old earring backs or to keep from losing your favorite earrings, these top quality earring backs stoppers are exactly what youve been looking for . Easy to Wear: To put on screw-in earrings, hold the earring backs firmly with one hand, and then rotate the earrings from the front. This is not only easy to wear, but it also prevents your hair from twisting into the earring backs .