Micro Drill Bit Set 0.3:1.2mmMaterial: Tungsten SteelSize:0.3-1.2mm(0.3/0.4/0.5/0.6/0.7/0.8/0.9/1.0/1.1/1.2mm)Shank Diameter: 3.175mmSuitable for circuit boards, electronic, SMT, mold, metal processing, telecommunications and other industriesCan be used for drilling iron, glass fiber, etc.
