50pcs 0.5 0.6 0.7 0.8 0.9mm PCB Drill Bit Set Print Circuit Board Micro Drill Bit 3.175mm Shank CNC Drilling Bit 50pcs 0.5 0.6 0.7 0.8 0.9mm PCB Drill Bit Set Print Circuit Board Micro Drill Bit 3.175mm Shank CNC Drilling Bit. Sale price : $10.04 Category : Tools