Diamond Twist Drills, Set of 6

Manufactured of high-speed steel, the twist drills in this set are ideal for cutting, smoothing, and enlarging holes in gemstones, hard stones, glass, and ceramics. The drill is electroplated with highly effective, commercial-grade diamond abrasive that cuts quickly; it is effective on stone and glass. This diamond twist drill sheds particulates and debris more efficiently than regular diamond drills for cleaner cutting and longer service life. Set includes one each of six sizes.