Features and Benefits:�5/8 in. diameter, 4-cutter head�Drilling depth 16 in.�Overall length 21 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.