Drillco High Speed Steel Black Oxide Aircraft Extension Drill Bit, 1/4" x 6"

This 6" Aircraft Extension Drill is perfect for heavy duty construction for portable or machine drilling in high tensile strength alloy steels. Made with premium high speed steel and surface treated with black oxide to last longer. Its 135° split point tip is self-centering, and the four-facet point allows for faster cutting and less “walking”. Best for curved surfaces and "hand-drilling" on harder materials.