Bead caps are most often used in jewellery making to enhance a bead or stone . They can also be used to stop the bead from falling off the end of a headpin or you can cap the end of a string of beads. No matter where you use the bead caps, they will add a distinct detail and texture to your design! These bead caps are a perfect fit for a 12mm bead. THESE METAL COMPONENTS ARE NICKEL FREE.