The Earthquake 10 Inch High Performance Earth Auger Bit are engineered for unrivaled power and efficiency which makes drilling holes in any soil type easier than ever before. This earth auger bit features a replaceable screw point, replaceable carbide cutting blades with additional pilot flight, and a splined input shaft with Quick Connect Coupler. These three features provide increased efficiency for your powerhead which means more holes to get the job done faster. Patent Pending Design.