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12 Inch Aircraft Extension High Speed Steel (HSS) Surface Treated

12 Inch Aircraft Extension
Ideal for drilling in mild steels where extra length for reach is required. They have a black oxide surface treatment that is abrasion resistant, reduces chip welding and improves chip flow. Manufactured to National Aerospace Standard 907.

Search> Drill Bits> 12 Inch Aircraft Extension

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High Speed Steel (HSS), Surface Treated
Manufactured to National Aerospace Standard 907. Made of heat resistant cobalt. 135° split point is self-centering and reduces thrust. Ideal for drilling in mild steels where extra length for reach is required. Sizes smaller than 1-1/16 have the 118° standard point.
Cobalt Steel, HD Split Point
Manufactured to National Aerospace Standard 907. Made of heat resistant cobalt. 135° split point is self-centering and reduces thrust.Ideal for drilling in tough, high tensile strength materials where extra reach is required. Sizes smaller than 1-1/16 have the 118° standard point.

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