These Bronze Cord End Caps can be used with satin cord, leather, hemp, imitation leather or suede lace to make necklaces or bracelets. They come in silver and there are many sizes to choose from including 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 13mm. These cord end caps are used by inserting a bead of glue into the cap and then pressing the cord into the cap. Various pack sizes that can be purchased are singles, 5, 10, 20, 50 or 100.