Cheap And Discounts 3.175mm Shank PCB Engraving Bit 0.1-0.5mm V Shape 3D Milling Cutter Nano Blue Coating Flat Bottom Engraving Bits CNC Router Bit Wholesale. Buy Directly From Merchant Shop1300258 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.