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Triumph T1HD 5/16" High Speed Steel Jobber Drill Bit

Brand: Triumph Mfg#: 12520
Product#: 172516
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ThunderBit® High Performance drills are made from industrial-grade steel, with a friction-reducing black and bronze oxide surface treatment for higher drilling speeds. Optional Titanium Nitride (TiN) coating provides the ultimate performance and durability. Unique spiral flute design improves chip ejection and coolant flow to the point; and the heavy-duty core guarantees increased strength and reduced breakage


  • Premium grade steel
  • Heavy duty construction
  • Unique flute design for superior material removal


  • Brand: Triumph
  • Product Line: T1HD
  • Flute Type: Spiral
  • Finish: Black/Bronze Oxide
  • Type: Heavy Duty
  • Length Group: Jobber
  • Point Type: Split
  • Overall Length: 4.5 in
  • Diameter: .3125 in
  • Point Angle: 135 deg
  • Flute Length: 3.1875 in
  • Shank Type: Round Straight
  • Material: High Speed Steel
  • Applicable Materials: Iron, Steel, Stainless Steel, Wood
  • Series: T1HD