Irwin Industrial Tools 43022 1-3/8-Inch Self Feed Bit Drill large diameter holes in wood for pipe, conduit and other applications. Effortless cutting, even in gummy wood. Each bit is packaged with one hex key and two feed screws. Feed screws has a coarse thread for fast boring. Spurs on the outside diametercut holes clearly and accurately. Quick-Change impact shank on all sizes., Brand IrwinReplaceable coarse screw point drills quickly in dry, wet and gummy woodFor drilling large diameter holes in wood for pipe, conduit and other applicationsAll 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 drillsForged in one piece from high carbon steel for Maximum strength under tough drilling conditionsPrecision milled shank eliminates run out and wobble
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