Did you guess wood auger?!
Auger, tool (or bit) used with a carpenter’s brace for drilling holes in wood. It looks like a corkscrew and has six parts: screw, spurs, cutting edges, twist, shank, and tang. The screw looks like a tapered wood screw and is short and small in diameter; it centers the bit and draws it into the work.
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Check out this book on Historic Barns of Ohio!