Drills - Diamond Coated Set

Twist drills with electroplated diamond particles are the ultimate for drilling stones, pearls, glass or ceramics. Use with standard hand pieces and a small amount of water as lubricant. Grit 140/170. Set includes six drills, diameters: 1.00, 1.30, 1.40, 1.60, 1.80, and 2.10mm. Shanks are 2.35mm.