10pcs PCB Drill Bits Set, 2.1mm-3.0mm Spiral Flute Carbide Micro Drill Bit for Print Circuit Board Stone Dremel Jewelry CNC Engraving - Tyenaza, Tyenazakdsoq7m8fx

• 【Multi Size】This contains 10 different size drill bits diameter: 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm. Shank Diameter: 3.175mm. Length: 38.1mm / 1.5". 【Cemented Carbide】The PCB Drill Bits are made of high quality cemented carbide and HHS, highly wear resistance, high hardness, bending strength, anti-impairment, highly working efficiency. 【High Precision】 With sharp cutting edge, milling groove and clean surface, these sets of tool work quickly and cleanly, no glitches or scrap left. Seismic design on the blade edge enables it to stay stable during engraving. 【Long Tool Life】With high hardness, high wear resistance, high strength, resistance to bending, anti-impairment. Made from Tungsten Carbide for precise, easy experience. 【Application】Great for 3D Printer Nozzle Cleaning, Amber beeswax, circuit boards, bakelite, CNC engraving plexiglass, jewelery, metal plastic and other precision drilling.