10pcs 0.25mm Tip Helical Groove Tungsten Carbide Micro PCB Drill Bits UXCELL (U excel !) is the sole authorized Seller of uxcell products Product Name : PCB Drill Bit;Material : Tungsten Carbide;Cutting Diameter : 0.25mm / 0.01";Cutting Depth : 5 mm / 0.2" Shank Diameter : 3 mm / 0.12";Total Length : 38 mm / 1.5" Color : Silver Gray;Weight : 42g Package Content : 10 x PCB Drill Bits1 x Plastic Case