Produce smooth holes on clean wood with this ship auger bit. Built with double wing spurs and non-stick, PTFE (polytetrafluoroethylene) flutes, this auger can cut through material with sap and glue without the need to clean after use. Durable to use with an impact wrench. It measures a total of 6 1/2 inches long with a 1 1/2-inch drill bit size, a four-inch long flute, and a 7/16-inch hex shank.