High speed steel cutting edge for superior durability in nail-embedded wood. Stays sharper longer. Chamfered edge allows bit to be removed easily after drilling. Flutes remove excess wood chips. Aggressive lead screw tip pulls the bit through material quickly and effortlessly. Extra lead screw and wrench included in every package. Longer shank that cuts 4"x4" without extension. Impact hex shank allows for quick changing of the bits.
