Size: about 7mm wide, 12mm long, 3.5mm thick, hole: 1mm, Pack of 40pcs,suitable for connecting with many kinds of jewelry, which is light and convenient.Quality Material: These Lobster Claw Clasp are made of 304 stainless steel, different from other materials, Smooth surface with high gloss, easy to use on jewelry making for a long time.Easy to Work: The lobster clasp set is not only suitable for repairing broken bracelets, but also has the additional usage of fixing the necklace when you lack the loop, which can make your necklaces and bracelets become complete again.Practical functions: these gold DIY necklace clasps are designed with bead open jump rings, making it easy for you to attach them to various necklaces, bracelets, handmade crafts and more without any other tools, suitable for craft beginners to have a try and enhance hands-on abilityWide Application:Our necklace clasps and closures are ideal supplies for various DIY craft projects and jewelry making,compatible with various DIY jewelry.make exquisite jewelry crafts as gifts.use this product to enjoy the beauty of handmade time with your friends and family.