925 Sterling Silver Material: These springclaw clasp are made of pure 925 silver and are smooth to the touch, durable, unbreakable and safe, comfortable to wear and won't harm your skin. Lightweight and sturdy, not easy to fade, and can maintain their shiny appearance for a long times. 3 Sizes of Clasps: There are 3 sizes of clasps. These about is 8x5x0.98mm, hole is 1mm; 9x6x1.09mm, hole is 1.47mm; 10x7x1.4mm, hole is 1.8mm, Jump rings is 3x0.5mm, inner diameter is 2mm. Perfect selection of sizes is suitable for DIY jewelry design or making. Adequate Quantity: You will get 36pcs Sterling Silver spring clasp totally. The sufficient quantity will meet your various decoration and DIY sterling silver jewelry making supplies needs. You can also share it with your family and DIY different crafts together. Easy to Use: The necklace extender comes with a spring clasp, allowing you to easily attach it to a variety of bracelets, necklaces, handicrafts, etc. without any other tools. Suitable for repairing broken bracelets, making your necklaces and bracelets whole again. DIY Jewelry Making: Our necklace clasps are ideal supplies for a variety of DIY craft projects and jewellery making.Spring clasps can be used to extend the length of a chain or to repair a chain connection, and can help you make a variety of necklaces, bracelets, pendants and other jewellery.