High Speed Steel Nitro drill bits offer superior performance over conventional HSS drills. Their Nitride treated, heavy-duty construction increases tool life and performance. 135 degree Split Point reduces walking at the drill point and makes these drills ideal for both hand held and CNC Operations. Black & Gold surface treatment for maximum lubricity. Usable in a wide range of materials including difficult to machine materials such as stainless steel. Jobber length for extra reach.