Big Hawg, Pilot Bit For Hole Cutter, 50X Life In Nail Embedded Wood & Abrasive Material Applications, Cuts 1000 Plus More Nails, 5X Faster Cuts, 5/16" Multi Material Pilot Bit, Carbide Tipped For Fast Drilling In Nail Embedded Wood & Abrasive Materials, Exclusive Bit Geometry Aids In Plug Removal.