Features and Benefits: Constructed of M-35 5% cobalt high speed steel for super abrasive resistance in tough metals; Heavy duty spiral flute design produces faster chip ejection; Shorter cutting lips reduce torque when drilling in high tensile strength materials; 135 degree split point reduces feed pressure for easier penetration without work hardening; IRWIN offers a complete line of Metal Twist Drill Bits, including Black Oxide, Turbo Point, Titanium Nitride, and Cobalt Drill Bits.. Ideal for drilling into hardened steel, alloys, titanium and stainless steel.