Hitachi 729015 Spline 3/4-Inch x 8-Inch x 13-Inch 2-Cutter Go to amazon.com Related posts Top 7 best shipping hammer for 2022 FeatureAggressive and DurableSpiral Flute Quickly Channels Debris From The HoleReinforced Flut Geometry Reduces Vibration And Transfers More Impact Energy DescriptionHitachi 729015 Spline Shank 3/4-Inch by 8-Inch by 13-Inch Hammer 2-Cutter Drill Bit