The screw auger is the most efficient type of bit because it pulls itself into the material and forces shavings out the top of the hole, but it is more difficult to make than a flat bit. This screw auger bit is permanently fixed in a wooden handle which allows downward pressure and leverage.
Auger Bit. ca. 1850. Pocumtuck Valley Memorial Association, American Centuries. https://americancenturies.org/collection/1953-15-01-01/. Accessed on October 16, 2024.
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