A must have for working with Venetian beads and Murano glass beads. This bead reamer is actually 3 tools in one. Used for enlarging, de-burring, and rounding-out bead holes. Three different tips are included to fit bead holes from the smallest up to 5.0mm. Each tip is coated with diamond dust for smooth, even reaming. Tips store conveniently inside the tool and attach to the front for use. Handy spring clip enables you to carry tool in your pocket. 4 1/2 inches.