Extra-secure fold-over (clamshell) bead tips. Approx. 3mm cup with 1mm hole. Designed to completely hide your knot. Tips have an extension with a hole on both sides. Your jump ring or split ring goes through the holes and helps keep the bead tip shut. Once you fold and press the halves together, it looks like a round bead! Hint: Tie a 2mm seed bead inside, instead of just knotting the cord. Made in the USA. Supplier states that beads and findings are not intended for children’s jewelry or for use by children under the age of 7.