Angle Heads, Hole Saw, Grinding Machine manufacturer / supplier in China, offering PCB Micro Spiral Drill Bit 10PC/Set 1.1mm to 2.0mm, 0.1mm to 1.0mm Thick Shank Tungsten Carbide Slot Drill Bits Set for Circuit Boards, Glass, Fiber, Circuit Board Micro Mini CNC Drilling Bit Set Print Tungsten Carbide PCB Drill Bits 10PCS 0.1mm-3mm OEM 6mm Plain ISO9001, Tungsten Carbide PCB Drill Bit Carbide Mini CNC Drilling Bit Set and so on.