This pack contains 3 pairs or 6 pieces of locking earring backs measuring approximately 5.4 x 4.7 mm with a 1.0 mm hole diameter, designed to fit most standard stud earring posts. Crafted from lightweight, anti-oxidation materials with a strong, secure clip that holds earrings firmly in place for long-lasting daily wear. The hypoallergenic design is suitable for sensitive skin, minimizing ear contact compared to larger backings to help reduce irritation and discomfort. Ideal as replacement earring backs for lost studs, jewelry repair supplies, and essential findings for custom accessories, handmade gifts, and creative DIY earring making for birthdays, holidays, and special occasions. This pack features 3 pairs or 6 pieces of locking earring backs measuring approximately 5.4 x 4.7 mm with a 1.0 mm hole diameter, designed to fit most standard stud earring posts. Made from lightweight, anti oxidation materials, each back is equipped with a strong and secure clip that keeps earrings firmly in place for reliable daily wear. The hypoallergenic construction is suitable for sensitive skin and reduces ear contact compared to larger backings to help minimize irritation. Suitable for replacing lost earring backs, jewelry repair, and essential findings for custom accessories, handmade gifts, and creative DIY earring projects for birthdays, holidays, and special occasions.