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 centres the bit and draws it into the work. At the working end of the twist there are two sharp points called spurs, which score a circle