The Delux Diamond Coated Bead Reamer is used to smooth bead edges to reduce wear on string, cord, thread and wire, and to smooth and enlarge holes in ceramic, glass, stone and other types of beads. The Delux Diamond Coated Bead Reamer features small and large reaming points and a 45 degree edge reamer (replacements are available to purchase separately). Has a hollow handle for storing diamond points, an easy release chuck that fits into the aluminum housing so that it releases instantly when the collet is unscrewed, an anodized aluminum handle, and a rust-resistant brass chuck. Please note: Always take proper precautions and wear a face mask when using.