Milwaukee®’s SDS-Max 4-Cutter Rotary Hammer Drill bits feature a 4-Cutter 4x90° 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. Bullets: 1 in. diameter, 4-cutter head SDS-Max shank Drilling depth 31 in. Overall length 36 in.