The WoodOwl 1" diameter x 18" long Ultra Smooth Power Auger Bit is lighter weight and safer than standard auger bits thanks to its exclusive three-flute design. Unlike other bits, it leave a super smooth hole with no blow-out. WoodOwl Auger Bits are constructed of high carbon steel, which is heat-treated and fully hardened for safety and durability. Tri-Cut Ultra Smooth Augers are the augers of choice when an extremely smooth hole is necessary, and when the user must anticipate cutting any nails that might show up in the work.