These Bead Cores enable you to create your bead and core it at the same time! To use, dip the mandrel that you plan to use (either 1/8" for a heavy dip or 5/32" for a thinner dip) and immediately slide the Bead Core onto the dipped mandrel. Lay flat and allow bead release to dry overnight. Create your bead right onto the Bead Core (working in a cooler flame so as not to melt or distort the Bead Core). When the bead is removed from the mandrel, it will already be cored for you! Overall length of Bead Core - 11mm Hole Size of Bead Core - 4.3mm Package Size = 1 Bead Core