You can use security beads in size 12mm when you need to complete projects such aspacifier clips, stroller hangers, stroller chains, key rings etc. In the safety beads, the hole is drilled slightly larger in one side of the bead than the other side. Then you can both hide the knot inside the bead, but at the same time you also secure. that the knot cannot be pulled through the bead so that your work is falls apart - and not least poses a danger to the baby. Awesome right?