Easy to open: The buckle is equipped with a spring inside and can be opened with just one click. Release your hand and the buckle will close by itself. Ideal for jewelry repair and creation, these extenders can be used to attach broken bracelets or necklaces, attach pendants and accessories, and work with beads, thread, and cord. Lobster clasps in various colors and sizes are available for you to choose from to meet your different needs. Durable and Strong: The jewelry clasp is made of high-quality zinc alloy. The surface is smooth and shiny, sturdy and durable. Not easy to fade, rust or deform. Wide application: These clips are perfect for DIY jewelry making, making some personal necklaces, bracelets, anklets, etc., or repairing broken bracelets.