10pcs 0.4mm Tip Spiral Flute Tungsten Carbide Micro PCB Drill Bits Product Name : PCB Drill Bit;Material : Carbide, Steel Cutting Diameter : 0.4mm / 0.016";Cutting Depth : 7 mm / 0.28" Shank Diameter : 3 mm / 0.12";Total Length : 38 mm / 1.5" Color : Silver Tone;Weight : 40g Package Content : 10 x PCB Drill Bits 1 x Plastic Case