Irwin Industrial Tools 43032 2-Inch Self Feed Bit Wood drill bits are great for drilling large-diameter holes in wood for pipe, conduit and more Each wood drill bit has a replaceable coarse screw point for drilling in dry, wet and gummy wood The self-feed bit has a precision-milled shank to help eliminate runout and wobble These self-feed drill bits are forged in 1 piece from high-carbon steel for high strength under tough drilling conditions All self-feed bits have a 7/16-inch hex quick-change impact shank that fits 1/2-inch or larger electric drills or 7/16-inch hex impact wrench drills For drilling large diameter holes in wood for pipe, conduit and other applications Replaceable coarse screw point drills quickly in dry, wet and gummy wood All bits have a 7/16-Inch hex quick change impact shank that fits 1/2-Inch or larger electric drills or 7/16-Inch hex impact wrench drills Precision milled shank eliminates run out and wobble Forged in one piece from high carbon steel for Maximum strength under tough drilling conditions