10pcs 3.175mm Shank 3 Edge PCB Engraving Bit Set 20/30/40/45/60/90 Degrees Tip 0.1 0.2 0.3mm Pyramid CNC Router Bit 3D Milling

10pcs 3.175mm Shank 3 Edge PCB Engraving Bit Set 20/30/40/45/60/90 Degrees Tip 0.1 0.2 0.3mm Pyramid CNC Router Bit 3D Milling

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