Milwaukee SDS-MAX MX4 3/4" 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 durable rebar guards to withstand the toughest conditions in hard aggregate and rebar applications. The sharp centering tips ensure 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 provide up to 15% more holes per battery charge. Each drill bit includes a wear mark indicator to show when it no longer meets ANSI standards, ensuring reliable performance. These MX4™ 4-Cutter Drill Bits are for demanding concrete with rebar and masonry jobs. Model Number: 48-20-3930