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Irwin 1/4" Cobalt High Speed Steel 135 deg Jobber Drill Bit

Brand: Irwin Mfg#: 63116
Product#: 17363116
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Irwin Heavy Duty Jobber Length Drill Bit, Series 633/631, 0.25 in Diameter, 1.375 in Flute Length, 2.5 in Overall Length, Jobber Length Group, Clockwise Cutting Direction, 135 deg Point, Split Point, Spiral Flute


  • Heavy duty spiral flute design produces faster chip ejection
  • Shorter cutting lips reduce torque for drilling in high tensile strength materials
  • Split point reduces feed pressure for easier penetration without work hardening
  • Constructed of M-35 5% cobalt high speed steel for super abrasive resistance in tough metals


  • Brand: Irwin
  • Overall Length: 2.5 in
  • Length Group: Jobber
  • Flute Type: Spiral
  • Cutting Edge Material: M35 Cobalt High Speed Steel
  • Flute Length: 1.375 in
  • Shank Type: Straight
  • Diameter: .25 in
  • Series: 633/631
  • Cutting Direction: Clockwise
  • Point Type: Split
  • Structure: Solid
  • Point Angle: 135 deg
  • Finish: Gold Oxide
  • Applicable Materials: Cast Iron, High Alloy Steel, Stainless Steel, Titanium, Hard Steel