10Pcs 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 mm PCB Mini Drill Bit tungsten steel carbide for print circuit board cnc Bits Machine

10Pcs 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 mm PCB Mini Drill Bit tungsten steel carbide for print circuit board cnc Bits Machine

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