Dottie 1824 - 1-1/2'' x 18'' Ship Auger Bit is made of S45C Grade Carbon Steel with an aggressive screw pitch for quick drilling. Its wide flutes ensure rapid chip removal and less binding, while the fortified cutting lip and hardened cutting edge provide durability. This polished bit is designed for use with power tools, featuring a long style, self-feeding drill point, and impact quick change shank. Can be re-sharpened for extended life, with an overall length of 18'', bit diameter of 1-1/2'', and 7/16'' shank size. Ideal for boring holes in clean or nail embedded lumber at 600 RPM.