These diamond-tipped reamers are intended for use on glass, ceramic or stone beads. Four tips for softening rough edges, and enlarging bead holes.
The long tapered reamer starts at about .6mm and goes up to 3mm. The short tapered reamer goes from.5mm to 1.4mm. The triangle reamer is about .8mm at the tip and 6.1mm at the base. The last reamer is for smoothing holes and measures 1.3mm at the tip and 4.8mm at the base. The handle measures 5.9 inches.