Triumph 058420 5/16" Aircraft Extension Drill, 135 Degree Split Point, Round Shank, 12 in Length, Style BP12HH, High Speed Steel, Black Oxide

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Triumph 058420 5/16" Aircraft Extension Drill, 135 Degree Split Point, Round Shank, 12 in Length, Style BP12HH, High Speed Steel, Black Oxide
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Overview


The BP12HH is a 12" extra-length aircraft extension drill made from high-speed steel with a black oxide finish, featuring a 135° split point for precise starts and smoother drilling. Its heavy-duty construction provides added strength and extended reach in deep or difficult hole applications.

Features:

  • Black oxide finish improves chip flow and increases abrasion resistance
  • 12" overall length with extended 9" flutes, specifically designed to maximize reach and performance in deep hole drilling applications.
  • Made from premium grade HSS to improve tool life
  • Self centering 135° split-point for reduced thrust requirements and minimized walking

Best Material Application:

  • Steel
  • Cast Iron
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