21Pcs Mini Micro Twist Drill 0.3-1.6mm HSS Bit Set Hand Spiral Pin Vise Jewelry Product Feature： 100% brand new and high quality. Self-driven turbine, hand drill automatic, accurate and efficient. High-precision, double-chuck, can clip 0.2~2.0mm drill. Sharp blades, small drilling resistance, chip removing smoothly, long life. Drawer transparent plastic boxes, elegant, easy to access. Suitable for woodworking drilling, electronics repair, home repair, can drill wood, plastics, circuit boards. Shank Diameter: 0.3mm 0.35mm 0.4mm 0.45mm 0.5mm 0.55mm 0.6mm 0.65mm 0.7mm 0.75mm 0.8mm 0.85mm 0.9mm 0.95mm 1.0mm 1.2mm 1.3mm 1.4mm 1.5mm 1.6mm Product Specification： Type：Drill Bit Set Material：HSS Color：Silver Length of hand drill：Approx. 11.2cm Package Included： 1 x Hand twist push drill with 2pcs chuck 20 x HSS Micro Drill bit set