Cheap And Discounts 10PC Titanium coat Carbide PCB mini drill Bit 0.2mm to 3.175mm CNC tool for print circuit board 3.175mm drill bit set PCB Wholesale. Buy Directly From Merchant Boboaldo Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.