Milwaukee SDS-PLUS MX4 3/8" X 10" X 12" Drill Bits with solid head carbide deliver up to 5 times longer life when drilling through concrete with rebar. Designed with rebar guards for maximum durability in tough aggregate and rebar, these bits feature a 4-cutter design that prevents lock-up, reducing downtime during your projects. The sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes efficiently remove dust faster, reducing heat buildup and allowing you to drill up to 20% more holes per battery charge. A wear mark indicator signals the end of life, showing when the bit no longer meets ANSI requirements. I for concrete with rebar and masonry applications, the Milwaukee MX4 4-Cutter Drill Bits combine durability and performance for demanding jobs. Model Number: 48-20-7354