Features and Benefits:1-1/2 in. diameter, 4-cutter headDrilling depth 17 in.Overall length 22 in.Spline shankMilwaukee®s spline 4-cutter rotary hammer drill bits feature a 4-cutter 4 x 90 tip geometry to avoid lock up in rebar, patented rebar chamfers for increased durability, and a high volume flute for fast debris removal. Used for drilling holes in brick, block, concrete, and reinforced concrete.