The Milwaukee SDS-MAX 4-Cutter MX41-1/2 in. X 18 in. X 23 in.Drill Bits deliver up to 5x longer life in concrete with rebar. Engineered with rebar guards to provide maximum durability in hard aggregate and rebar. MX4 4-Cutter bits are designed with sharp centering tips for exact spot drilling in concrete. The integrated 4-cutter design prevents lock-up in rebar, reducing downtime. Variable flutes remove dust faster, reducing heat and delivering up to 15% more holes per battery charge. This bit features wear mark indicators to show the end of life and when bit no longer meets the ANSI requirement.The Milwaukee MX4 4-Cutter Drill Bits are ideal for concrete with rebar and masonry applications.. Bit Material: Carbide. Drill Bit Type: Percussion Bit. Drill Bit Type(s) Included: Percussion Bit. Individual/Set: Individual. Material Application: Concrete. Number of Pieces: 1. Number of Pieces: 1 Piece. Returnable: 90-Day. Shank Style: SDS Max. Tools Product Type: Power Tool. Bit Diameter: 1-1/2 in. Bit Length (in.): 23 in. Shank Diameter: 45/64 in. Bit Diameter: 1-1/2 in. Bit Length (in.): 23 in. Drill Bit Type: Percussion Bit. Shank Style: SDS Max. Material Application: Concrete. Number of Pieces: 1. Number of Pieces: 1 Piece. Shank Diameter: 45/64 in