Iron Folding Crimp Ends, Fold Over Crimp Cord Ends, GoldenSize: about 3.5mm wide, 9mm long, 4mm thick, hole: 2mm.â Usage: Cord tips are for terminating necklaces or bracelets. Use with our satin cord, leather, hemp, imitation leather or suede lace.â Easy to Use: Lay the ends of the cords in the folding crimp ends; use a plier to press down the sides at a time to fix the cord tightly on the metal crimp end caps. Finally, attach it to a lobster clasp with a jump ring.