RECOMMENDED FOR DRILLING CAST IRON, NON FERROUS ALLOYS, PLASTICS, ALUMINUM AND OTHER EASILY MACHINED MATERIALS AND OFFERS EXCELLENT HARDNESS, WEAR RESISTANCE AND HEAT RESISTANCE FOR HIGHER CUTTING SPEEDS AND LONGER TOOL LIFE. TITANIUM ALUMINUM NITRIDE (TIALN) COATING INCREASES SURFACE HARDNESS, WEAR RESISTANCE, HEAT RESISTANCE, CHIP FLOW AND RESISTS CHIP WELDING.