Milwaukee SDS-MAX MX4 1/2" X 31" X 36" features the MILWAUKEE® MX4™ 4-Cutter SDS Max Rotary Hammer Drill Bits with solid head carbide that deliver up to five times longer life in concrete with rebar. Designed with rebar guards, these bits provide maximum durability in hard aggregate and rebar, ensuring reliable performance in tough conditions. The sharp centering tips allow for precise spot drilling in concrete, while the integrated 4-cutter design prevents lock-up in rebar, minimizing downtime. Optimized flutes efficiently remove dust, reduce heat buildup, and enable up to 15% more holes per battery charge. Each drill bit includes a wear mark indicator that shows when it no longer meets ANSI requirements. These MX4™ 4-Cutter Drill Bits are for concrete with rebar and masonry applications, combining durability and efficiency for professional results. Model Number: 48-20-3906