IRWIN Tools Drill Bit Set, Cobalt Alloy Steel, Jobber, Fractional, 21 Piece (63221)

Drill bits are made of M-42 5% Cobalt Alloy Steel high-speed steel for super abrasive resistance in tough metals 135° split point reduces feed pressure for easy penetration without work hardening Each drill bit has a heavy-duty spiral flute design that produces faster chip ejection Shorter cutting lips reduce torque for drilling in high-tensile-strength materials Cobalt Alloy Steel drill bit set comes in a metal index case Drill bits are made of M-42 5% cobalt high-speed steel for super abrasive resistance in tough metals Cobalt drill bit set comes in a metal index case, Weight: 1.0 pounds, Manufacturer: IRWIN