EnPoint&trade; TiN Coating Tungsten Carbide Drill Bit 1/8" 3.175mm HSS Shank 2.5mm Cutter Diameter CNC Boring Bit 12mm Flute Length Hand Drilling Twist Bit for PCB Amber Beeswax Glass Fiber Resin The cutting edge is produced from tungsten carbide and the shank is high-speed steel With a premium, ultra-fine, Nano Grade TiN coating for maximum tool strength and durability Sharp cutting edge produces excellent clean holes Great chip clearance space for chip evacuation Effective for producing wax casting models