These diamond-coated twist drills are the ultimate tool for drilling stones, pearls, glass, or ceramics. They are made with electroplated diamond particles (medium-fine grit) and are mounted on 3⁄32-inch shanks to be used with standard handpieces and a small amount of water as lubricant.

For Jewelers, making jewelry needs this Diamond Twist Drill. Made from finest steel, milled to pefection with a diamond coating makes this range of files the best for precision filing jobs. Longevity is assured, as the diamond particles are electroplated onto the surface of the metal.