Ear StudYou will receive 40pcs ear stud components and 40pcs ear nuts , which are stored in a transparent bead container for daily use and storage. SizeEarring backs clasps 6mm wide, 3mm long, 4mm thick, hole: 0.7mm.The back of the earring fits most of the earringsThey will hold your earrings in place and you will be very satisfied. Good DIY Earrings Supply: Ear stud components allow you to DIY your earrings with hot liquid glue and some rhinestones and crystal backs. Why This Ear Stud:The ear is made of stainless steel, durable, anti oxidant and fade, safe for most skin types, and does not cause allergic reactions. Suitable for most earrings to adhere to, its extremely strong and safe grip, easy to insert, moderate elasticity, multiple use, not loose. Fit For:Earring nut is a great choice for DIY earring lovers. Very suitable for earring making postsearring back replacement, earring back, earring production supplies, earring repair.