10pcs 0.8mm Tip Helical Groove Tungsten Carbide Micro PCB Drill Bits Product Name : PCB Drill Bit;Material : Tungsten Carbide Cutting Diameter : 0.8mm / 0.031";Cutting Depth : 10 mm / 0.39" Shank Diameter : 3 mm / 0.12";Total Length : 38 mm / 1.5" Color : Silver Gray;Weight : 40g Package Content : 10 x PCB Drill Bits1 x Plastic Case