Wood Auger

A wood auger is a device for drilling wood, consisting of a rotating metal shaft that scrapes or cuts into the material with a blade at its end. In the classical design, a helical screw blade winds around the lower end of the shaft; the blade's lower edge is sharpened to scrape away wood while the rest of the blade lifts the resulting chips clear of the hole, and the traditional hand tool is turned by gripping a T-shaped handle fixed to the top of the shaft with both hands. A typical woodworking, or carpenter's, auger is built from six distinct functional parts: a feed screw, a cutting lip, a spur, a twist, a shank and a tang, and later versions of the tool were adapted to be driven by a brace, a wheel drill such as an eggbeater drill, or an electric power drill rather than turned by hand alone.