Milwaukee SDS-MAX MX4 7/8" X 8" X 13" features the MILWAUKEE® MX4™ 4-Cutter SDS Max Rotary Hammer Drill Bits with a solid head carbide design that delivers up to five times longer life when drilling through concrete with rebar. These bits are engineered with rebar guards to ensure maximum durability when working with hard aggregate and rebar, making them i for tough concrete and masonry applications. The sharp centering tips allow for precise spot drilling, while the integrated 4-cutter design prevents lock-up in rebar, minimizing downtime. Optimized flutes efficiently remove dust to reduce heat buildup, enabling up to 15% more holes per battery charge. Additionally, each drill bit includes a wear mark indicator to show when it no longer meets ANSI requirements, helping you maintain optimal performance and safety. Model Number: 48-20-3944