uxcell PCB Drill Bits 4mm Tungsten Carbide Spiral Flute Jewelry CNC Engraving Print Circuit Board Micro Drill Bits 1/8\ Shank
- Specifications: Cutting edge diameter (CED): 4mm / 0.157".
- Long Tool Life: Made from tungsten carbide, high hardness, high wear resistance, high strength, resistance to bending, anti-impairment, long service life..
- Spiral Flute Bits: Spiral flute drill bits reduce cutting force and prevent drill broken, improve the drilling accuracy. Large drill bit chip space, chip resistance, chip smooth, small drilling heat..
- Precision: With sharper cutting edge, milling groove and clean surface, the carbide PCB drill bits can work quickly and cleanly, no glitches or scrap left..
- Applications: Great for PC boards, plastics, fiberglass, wood, soft metals. Suitable for PCB drilling machines, engraving machine, CNC and high precision special drilling equipment..