PCB Carbide micro drill bit 0.3mm to 1.2mm 10pcs/SetPrecision machining by high accurate equipment. With good milling and cutting performance, ensuring high efficiency. High hardness, wear resistance, and intensity; anti bending. To removing chips, with big space and small resistance; Smooth chip removal, less heating value, to reduce pollution. Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall; Symmetrical cutting blade, help to high effective cutting,