Milwaukee SDS-MAX MX4 3/4" X 17" X 21" features the MILWAUKEE® MX4™ 4-Cutter SDS Max Rotary Hammer Drill Bits designed with solid head carbide to deliver up to five times longer life when drilling into concrete with rebar. These bits are engineered with rebar guards to ensure maximum durability in tough aggregate and rebar conditions. Milwaukee’s MX4™ 4-Cutter bits include sharp centering tips for precise spot drilling in concrete, while the integrated 4-cutter design helps prevent lock-up in rebar, minimizing downtime. Optimized flutes efficiently remove dust faster, reducing heat buildup and allowing up to 15% more holes per battery charge. Each drill bit features a wear mark indicator to show when it no longer meets ANSI requirements. These drill bits are i for use in concrete with rebar and masonry applications, combining durability and efficiency for demanding jobs. Model Number: 48-20-3932