Milwaukee SDS-PLUS MX4 5/8" X 10" X 12" drill bits feature a solid head carbide design that delivers up to five times longer life in concrete with rebar. Engineered with rebar guards, these bits provide maximum durability in tough aggregate and rebar conditions. The innovative 4-cutter design prevents lock-up, reducing downtime for more efficient work. A sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes help remove dust faster, reducing heat buildup and enabling up to 20% more holes per battery charge. Additionally, a wear mark indicator signals the end of the bit’s life and when it no longer meets ANSI requirements. These MX4 4-Cutter Drill Bits are i for concrete with rebar and masonry applications, ing reliability and extended performance on the job. Model Number: 48-20-7203