Irwin Industrial Tools 47408 1/2-Inch by 17-Inch Tubed Long Ship Auger Bit Single cutter and side lip effortlessly bores holes in wood where nails may be encountered. Cuts through nails without damaging the bit Full-length heat treatment guards against bending in heavy-duty applications and strengthens the twist where the greatest strain occurs Hollow center flutes clear chips quickly out of holes Wide lands help keep bit straight as it bores Medium-fast screw point ideal for general woodboring applications. Bit can be resharpened