Enlarge bead holes with ease using the Beadalon battery operated bead reamer. This is an excellent tool to use when a bead is just a bit too small for the stringing material you are using. Enlarge holes in pearls, gemstones and other beads. This reamer comes with two tapered tips. Replacement tips are sold separately. Always ream with the tip and bead submerged in water, as shown on the back of the packaging. This reamer requires two AA batteries, which are not included.