Milwaukee SDS-PLUS MX4 7/16" X 4" X 6" drill bits with solid head carbide are designed to deliver up to five times longer life when drilling through concrete with rebar. Featuring a 4-cutter design and engineered rebar guards, these bits provide maximum durability and help prevent lock-up, reducing downtime during tough jobs. The sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes efficiently remove dust, reduce heat buildup, and enable 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. These drill bits are i for concrete with rebar and masonry applications, making them a reliable choice for demanding drilling tasks. Model Number: 48-20-7361