Tarnish Resistant 304 Stainless Steel Coil Cord Ends, Stainless Steel ColorSize: about 4.5mm in diameter, 11mm long, hole: 3mm.â Easy to Use: First, insert the cord into the coil ends; Second, use a chain nose plier to grab the last coil, then slowly twist and compress it on to the cord, until itâs pinching the ends of the cord tightly. Finally, attach a clasp to the loop. â Work with: The jewelries end fasteners are compatible with satin cord, rope, leather, silk, suede lace, or other stringing materials. â Application: The coil cord ends, also called as coil necklace ends or bracelets, fit for making bracelets, necklaces, Kumihimo bracelets, tassels or other DIY jewelries.