Milwaukee SDS-PLUS MX4 1-1/4" X 16" X 18" drill bits feature a solid head carbide design that delivers up to five times longer life when drilling through concrete with rebar. These bits are engineered with rebar guards for maximum durability in tough aggregate and rebar conditions. The innovative 4-cutter design prevents lock-up, reducing downtime and improving efficiency. A sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes help remove dust faster, reducing heat buildup and allowing for up to 20% more holes per battery charge. Additionally, a wear mark indicator signals the end of the bit’s life when it no longer meets ANSI requirements. The Milwaukee MX4 4-Cutter Drill Bits are i for demanding concrete with rebar and masonry applications, ing reliability and performance on every job. Model Number: 48-20-7266