Glue-in style cord end caps fit-up to insert about 5mm cord or chain. Usage: Fit for DIY cord jewelries, tassels making, compatible with leather, ribbon, tassel, lace, hemp, suede, rope and other various cord. Easy to Use: First, attach a clasp to the end cap with a jump ring. Second, apply glue inside the cord ends caps. Third, insert the end of the cord into the end cap and wait to dry.