The Lenox Tools 145400080716 7/16-Inch by 18-Inch Ship Auger Bit is a sharp and durable Auger bit for long tool life. The Auger Bit features a 62 degree optimal cutting angle with a reinforced cutting edge for greater durability in nail encounters. The screw tip is hardened to increase wear resistance for extended life and the twist is manufactured using a forging process which will withstand more torque than a traditional milled process.