IRWIN Tools Pole Augers with Weld Tec, 15/16-Inch, 18-Inch (1826634), Pole Augers with Weld Tec, Welded high speed steel cutting edge is sharper and larger so it cuts faster and lasts longer in dense, treated, or creosote-soaked wood., Feed screw is 50% larger and has a 10% faster pitch and is designed specifically for drilling deep holes in dense wood.