Irwin Industrial Tools 63137 Cobalt Fractional Straight Shank Jobber Length Metal Index Drill Bit Set, 15-Piece
Brand: Irwin Tools
Constructed of M-42 5 percent 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 for drilling in high tensile strength materials.
135-Degree split point reduces feed pressure for easier penetration without work hardening