Milwaukee SDS-MAX MX4 1/2"X 7" X 13" drill bits are engineered to deliver exceptional performance and durability for concrete and masonry applications. Featuring the innovative MX4™ 4-Cutter design with solid head carbide, these SDS Max Rotary Hammer Drill Bits provide up to five times longer life when drilling through concrete with rebar. The sharp centering tips ensure precise spot drilling, while integrated rebar guards maximize durability against hard aggregate and rebar. Optimized flutes efficiently remove dust, reducing heat buildup and allowing you to drill up to 15% more holes per battery charge. Additionally, the wear mark indicator on each bit helps you know exactly when the drill bit no longer meets ANSI standards, ensuring consistent reliability and safety on the job. Model Number: 48-20-3902