#21 X 12" Aircraft Extension Drill Bit | Cobalt | GLBCOX1221
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#21 X 12" Aircraft Extension Drill Bit | Cobalt | GLBCOX1221

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#21 X 12" Aircraft Extension Drill Bit | Cobalt | GLBCOX1221

Drill AmericaSKU: GLBCOX1221
Price:
$8.62 $15.84per 1( $8.62 each)
Pieces 1
Measurement type Inch
Diameter #21
Length 12
Material Cobalt
Finish Gold
Flute length 2-1/8
Point type Split Point
Shank Round
Size #21
Weight 1.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Specs

  • Quantity: 1 piece
  • Size: #21
  • Overall length: 12 in
  • Material: Cobalt alloy
  • Type: Extension drill bit designed for deep-hole applications

Features

  • Cobalt alloy provides enhanced wear and heat resistance for drilling through tougher metals compared with standard HSS bits
  • 12" extension length enables access to deep holes in confined spaces such as engine bays, chassis, and aerospace components
  • Rigid extension design helps maintain straightness and consistent hole geometry during deep-hole drilling
  • Ideal for metal fabrication, maintenance, and repair tasks where depth and material hardness are factors
  • Single-piece delivery simplifies inventory and ensures a ready-to-use long-reach bit when needed

Physical

  • Length: 12 inches
  • Diameter designation: #21
  • Construction: Cobalt aircraft extension bit (long-reach drill bit for hard metals)

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If you’re not sure that this product is right for you, give us a call!
800-222-0324

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