akaddy 10pcs Circuit Board PCB Drill Bits Tungsten Steel Twist Drill Bits (0.7mm)

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  • Design of calibration ring to improve work efficiency
  • Use high-quality materials and fine grinding technology to make the cutting edge sharper, reduce cutting force and drill breakage, and improve the quality of hole wall.
  • Tungsten carbide steel with high hardness
  • Strictly avoid local holes and ensure the quality of trimming.

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