Irwin Tools 46608 Hand Brace Utility Pole Auger Bits, Taper Square Shank, 1/2" by 18", Single Auger drill bit has a medium-fast screw point for general wood-boring applications Remove the taper square shank on the auger bit for use in an electric drill or hand brace The auger bits have an extra-long twist for boring large poles, construction timbers and more Each auger drill bit uses a full-length heat treatment to guard against bending in heavy-duty applications and strengthen the twist where the greatest strain occurs Single spur, cutter and side lip are designed for boring through creosoted poles with minimal clogging, binding and stopping to clear chips Auger drill bit has a medium-fast screw point for general wood-boring applications Remove the taper square shank on the auger bit for use in an electric drill or hand brace The auger bits have an extra-long twist for boring large poles, construction timbers and more Each auger drill bit uses a full-length heat treatment to guard against bending in heavy-duty applications and strengthen the twist where the greatest strain occurs Single spur, cutter and side lip are designed for boring through creosoted poles with minimal clogging, binding and stopping to clear chips