Battery Operated Bead Reamer. To easily enlarge holes in pearls, gemstone, or other beads, submerge bead and tip into a small amount of water, firmly hold bead and press the button and watch the reamer work. Includes two reamer tips which measure 5 cm and taper from approximately 2 mm at the base to 0.5 mm at the tip.Details:8" x 2.75" x 1" package size5.25" tool sizeIncludes two 5 cm reamer tips (taper from approximately 2 mm at the base to 0.5 mm at the tip)Requires 1 AA batteries (not included)Replacement tips sold separately