Milwaukee SDS-Max Bit 1-3/4 in. x 23 in.Milwaukees SDS Max 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. 1 3 4 in. diameter, 4 cutter head SDS Max shank Drilling depth 18 in. Overall length 23 in. Includes: (1) SDS MAX MX4 1 3 4 in. X 18 in. X 23 in. (48 20 3992)