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40x12 in HSS drill bit with 1/2 in shank

Drill America ★ 3.7/5 · ItemOracle Score Mid-Range

$62 USD
Price subject to change
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Drill America 39/64" x 12" HSS Extra Long Drill Bit with 1/2" Shank

HSS extra-long drill bit for general purpose drilling with extended reach. Offers hardness and toughness with lubricity from black oxide treatment; round shank for versatile toolholding. Customers note good function and sharpness, with mixed durability

Highlights

  • high-speed steel composition
  • extra-long length for reach
  • black oxide treatment for lubricity

Pros

  • general-purpose performance
  • extra-long reach
  • black oxide lubricity
  • round shank for versatile toolholding
  • sharp cutting edge

Cons

  • mixed durability reports
  • some users report bending or breaking
  • variable drilling accuracy across materials

Best For

  • drilling long through-holes in metal
  • reach-intensive drilling in iron and steel families
  • projects requiring extended bit length
  • applications with limited access
  • drilling through multiple boards when required

Features

  • HSS material provides hardness and toughness for wear resistance
  • Black oxide coating increases lubricity and holds coolant near cutting edge
  • Extra long 12" reach with 1/2" shank for extended drilling applications
  • Designed for general purpose drilling across iron and steel materials
  • Round shank compatible with a wide range of toolholding systems

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