Irwin 4935574 Auger Drill Bit, 1-3/8 in Dia, 17 in OAL, Hollow Center Flute, 7/16 in Dia Shank, Hex Shank

The Irwin with WeldTec" ship auger is made stronger and lasts longer than any ship auger in the world. It features a welded cutting edge that easily cuts through tough materials like nail-embedded wood. It has twice the nail cutting life of standard ship augers. With an aggressive screw-pitch for faster drilling, this bit is fully-forged for maximum durability and wide flutes provide maximum chip removal with less binding.