10pcs Tungsten Carbide Micro Drill Bits Set Engraving Tools for PCB Circuit Board 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2mm

10pcs Tungsten Carbide Micro Drill Bits Set Engraving Tools for PCB Circuit Board 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2mm