Feature:1. Designed for pearl beads punching, jewelry processing and making.2. Come with a plastic storage case, convenient to carry and easy to use.3. Using high speed steel material, durable and having long service time.4. This twist drill bit has great performance and small size, suitable for professionals.5. The straight shank design is suitable for a variety of electric drilling rigs.Specification:Item Type: Punch Twist Drill BitMaterial: High speed steelSpecification: Approx. 0.85mm / 0.03in Package List:10 x Drill Bit