Milwaukee SDS-PLUS MX4 3/4" X 6" X 8" drill bits with solid head carbide are designed to deliver up to 5 times longer life when drilling through concrete with rebar. These drill bits feature a 4-cutter design that prevents lock-up, reducing downtime and enhancing productivity. Engineered with rebar guards, they provide maximum durability in tough aggregate and rebar conditions. The sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes efficiently remove dust, reduce heat, and allow for up to 20% more holes per battery charge. Additionally, a wear mark indicator signals when the bit has reached the end of its life and no longer meets ANSI requirements. I for concrete with rebar and masonry applications, the Milwaukee MX4 4-Cutter Drill Bits reliable performance for demanding jobs. Model Number: 48-20-7210