This tool, developed by Sundance decades ago is the first in a series of unique glass shaping tools. It is used to help shape your glass bead. Two ways to use this tool. Make a barrel bead by rolling your molten glass against the curve. or turn the glass 90 degrees and work it the other direction. your bead back and forth in the groves to shape. Two different diameters allow two different size beads. Made of graphite carbon. Place an order now.