AMACO-Bead Piercing Pins Refill 50 pieces per package. Bead piercing pins for drying clay beads. Clay beads are easier to dry with bead piercing pins. Just pierce polymer or clay beads on an AMACO Bead Roller and transfer to the AMACO Bead Baking Rack for baking or air drying. Your beads will be perfectly shaped without flat spots or fingerprints. Caution: Bead piercing pins are sharp and can cause injury. Not intended for use by children.