Irwin® Cobalt High Speed Steel Drill Bits; 5/16"

Item# 901-786650ORS  Model # 63120
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Drill Bit heavy-duty spiral flute design, 1 5/8 in Flute.
  • Type: Series 3016/631, jobber length
  • Bit diameter: 5/16 in
  • Shank type: Straight
  • Flute length: 1 5/8 in
  • Overall length: 2 13/16 in
  • Constructed of M-35 5 percent cobalt high speed steel for super abrasive resistance in tough metals
  • Produces faster chip ejection
  • Shorter cutting lips reduce torque for drilling in high tensile strength materials
  • 135 deg split point reduces feed pressure for easier penetration without work hardening
  • Applicable materials: hard Steel, stainless steel, titanium

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