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Tru-Cut 5/16" Cobalt High Speed Steel Jobber Drill Bit

Brand: Tru-Cut Mfg#: COB.312
Product#: 172COB312
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Our Heavy Duty drills are built with a heavy web construction, and 135 deg Split-Point for maximum rigidity and heavier cutting ability. Our Cobalt High Speed drills are made of high speed Cobalt Steel. The Cobalt content adds high abrasion resistance to the already hard working properties of our Heavy Duty Drills. Heavy web construction and 135 deg Split-Point add to the long life of these bits.


  • Brand: Tru-Cut
  • Length Group: American Jobber
  • Type: Heavy Duty
  • Cutting Edge Material: Cobalt
  • Diameter: .3125 in
  • Point Type: Split
  • Point Angle: 135 deg
  • Material: High Speed Steel
  • Standards: NAS 907 Type B
  • Flute Length: 3.1875 in
  • Flute Type: Ground
  • Overall Length: 4.5 in