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"The King of Heavy Duty"

(800) 839-9981

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Blue Diamond Auger Bits & Extensions

Tree Auger Bit Standard Duty Auger Bit Heavy Duty Auger Bit Extreme Duty Auger Bit
Standard Duty
  • Light to moderate ground conditions
  • Fabricated boring head
  • Hardened bolt on teeth
  • Hardened fist tail point
  • 4' standard length
  • Heavy duty double flighting
Heavy Duty
  • Difficult ground conditions, heavy clay, frozen ground, fracturable rock, asphalt, and compacted soils
  • Cast steel boring head
  • Hardened drive in teeth
  • Hardened fish tail point
  • 4' standard length
  • Heavy duty double flighting
  • Carbide teeth available
Extreme Duty

(Requires minimum down pressure of 3,000 lbs. to work well)

  • Solid rock and concrete
  • Cast tooth pockets
  • Drive-in carbide bullet teeth
  • 3/4" thick boring head
  • 4' standard length

The standard collar is 2" hex with 2" round and 2 9/16" round being available upon request. Adapters are also available to mount the bits to other drive units.

Extensions are available in 2', 4', and 6' lengths. The variable option has a hole every 12" for use in multiple positions (works on 10" and bigger bits only) and the fixed is a solid shaft. The fixed style in recommended if the application is very strenuous or when using high pressure drive units.

National Attachments, Inc.

16 Mechanic Street
Gorham, Maine 04038
Toll Free: (800) 839-9981
Phone: (207) 839-9999
Fax: (207) 839-6816