【Solid Material】These craft supplies are made of iron and metal alloy, with fine workmanship. The well-polished surface is treated with electroplating, making them durable and long-lasting. 【3 Sizes Ribbon End Clamps】: 2cm/1.5cm/1.0cm; Use pliers to close the ribbon clamps, and they will hold your cord in place with their inner teeth, concealing the frayed ends of the ribbon. 【Extension Chains】: Metal chain extenders: 7cm, 20 pcs per color, can be used as necklace and bracelet chain. Lobster clasps: 1.2cm (0.47\"), 20 pcs per color. Jump rings: 5mm (0.2\"), 100 pcs per color. Used to connect chain, clasps, and other decorations. 【Easy to Use】: The tabs on the end allow you to slide your project through the slot. Once your project is in place, fold the tabs over and press the end piece firmly around your project. Then, you can easily attach the lobster clasp to your piece with the extension chains. 【Wide Application】: Perfect for finishing your multi-strand designs. Use with beaded designs, seed beads, tumbler chain, ball chain, synthetic thread, aluminum mesh, and various cord wires for a quick and clean finish.