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

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

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