Drill America 12 in. High Speed Steel Aircraft Extension Drill Bit Set, 5-Piece
Engineered for general-purpose applications, these high-speed steel aircraft extension drills provide an ideal balance of hardness and toughness for superior wear resistance. The black oxide treatment enhances lubricity and holds coolant near the cutting edge, while the 135° split point ensures self-centering performance. These extra-long 12-inch bits are designed specifically for applications requiring extended reach.
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Engineered for general-purpose applications, these high-speed steel aircraft extension drills provide an ideal balance of hardness and toughness for superior wear resistance. The black oxide treatment enhances lubricity and holds coolant near the cutting edge, while the 135° split point ensures self-centering performance. These extra-long 12-inch bits are designed specifically for applications requiring extended reach.
- Includes five essential sizes: 1/4 in., 5/16 in., 3/8 in., 7/17 in., and 1/2 in. with a 12 in. overall length.
- High-speed steel construction offers a perfect combination of hardness and toughness for long-lasting wear resistance.
- Black oxide surface treatment provides abrasion resistance, reduces chip welding, and improves chip flow.
- Features a 135° split point that is self-centering to reduce thrust during operation.
- Manufactured to National Aerospace Standard 907 for high-quality performance.
- Extra-long 12 in. design provides the necessary reach for specialized aircraft and general-purpose applications.