Bead reamers are useful for widening and de-burring the holes in beads. This set includes two different reamers set in hardwood handles. One reamer tapers from 3mm to 0.3mm and is diamond coated. The other reamer has a 45 degree point for rounding off the edges of holes so that they do not cut through bead cord. Use water or diamond for smoother cuts and longer life. Overall length averages 5 (12.5 cm). Note: Remember to wear eye protection. Note: Photographs are for illustration purpose only. Actual item may slightly differ from the pictures shown.