Diamond Coated Bead Reamer Set includes 3 Diamond-Points

This quality diamond-tip bead reamer set includes a hollow aluminum handle with brass chuck. Three points included are: 45% Edging Point which smooths bead edges to reduce wear on string, cord, thread and wire; a small reaming point and large reaming point which can both be used to straighten, smooth and enlarge holes in ceramic, glass, stone and other types of beads. The smallest point is .5mm, largest is 5.25mm. Here's how BR600 works: 1) Loosen collet, insert the base of a point into the chuck and re-tighten. 2) Wet the point with water and turn it side to side until the hole is smooth or enlarged to desired size. Do not breathe in any dust particles.