PandaHall Elite 1 Box Iron Cord Ends Terminators Crimp End Tips Knot 6 Colors for Jewelry Making Size: about 4mm wide, 8mm long, 3mm inner diameter, hole: 1.5mm. Material: Iron. Finish: Nickel Free. Usage: Cover the knots on the nd of beaded necklaces or bracelets. 6 Mixed Colors: Color: Antique Bronze & Red Copper & Golden & Silver & Platinum & Gunmetal, meet your various needs for jewelry making. These mini crimp ends are handy for finishing your string or cord. Insert the end of your cord into the crimp end, and use your pliers to flatten the folds one at a time, tightly to the cord. The loop at the top of the square makes it easy to add a clasp or other connector. You can attach your clasp or jump ring to the loop on the end.