Dottie 612 - 3/4'' x 6'' Ship Auger Bit is made of S45C Grade Carbon Steel, featuring an aggressive screw pitch, wide flutes, hardened cutting edge, and fortified cutting lip. With two recesses for extensions, it offers quick drilling in clean or nail-embedded lumber. This polished bit is designed for power tools, with a self-feeding drill point and impact quick change shank. Perfect for high-speed drilling at 600 RPM, the bit has a 3/4'' diameter, 4'' flute length, and 7/16'' shank size. Resharpenable for extended use, it is a short-style bit for efficient hole boring.