Dottie 616 - 1'' x 6'' Ship Auger Bit is made of S45C Grade Carbon Steel and features an aggressive screw pitch for quick drilling. It has wide flutes for rapid chip removal, a hardened cutting edge, and fortified cutting lip for quick hole boring. This polished bit is designed for use with power tools, has a 600 RPM speed, and a short style with an overall length of 6'' and a bit diameter of 1''. It has a flute length of 4'' and a self-feeding drill point. The shank type is Impact Quick Change with a size of 7/16'', and two recesses are provided to accommodate extensions. This bit can be re-sharpened for extended life.