10PCS 0.3mm-1.2mm PCB Drill Bits Carbide Set Milling Cutter Micro Cutting Tool

3 Flutes 35mm Hex Shank Forstner Bit Hinge Hole Boring Cutter Wood Drill Bits. 10PCS 0.3-1.2mm PCB Drill Bits Set. -Extraordinary Cutting Edge Sharpness: As a Result Of Nanotechnology And Advanced Grinding Technology, Bit More Sharp Cutting Edge Than Before, Can Reduce The Cutting Force, Reduce The Broken Drill Rate, Improve The Hole Wall Quality.

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