10pcs 0.3mm to 1.2mm PCB Print Circuit Board Drill Bits Carbide Micro CNC PCB Dremel End Mill Milling Hole 0.30-1.20mm PCB Print Circuit Board Drill Bits Engraving Drill Bit Quantity:10pcs(Each size 1pcs) Set size:0.30,0.40,0.50,0.60,0.70,0.80,0.90,1.00,1.10,1.20mm Material: Tungsten Carbide Shank diameter:3.175mm Total length:38mm