These cord ends are stainless surgical steel, resist rust, tarnish and corrosion. Great easy way to finish off thicker cording necklaces, bracelets, anklets etc. Simply insert the end of your design and fold over sides of the cord ends, add your jumprings or clasps to the loop. They measure 11mm long and will accomodate cording up to 2mm thick. You will receive a package of 50.