Milwaukee SDS-MAX MX4 5/8"X 15" X 21" features the MILWAUKEE® MX4™ 4-Cutter SDS Max Rotary Hammer Drill Bits designed with a solid head carbide that delivers up to five times longer life when drilling through concrete with rebar. These drill 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. The optimized flutes efficiently remove dust, reducing heat buildup and enabling up to 15% more holes per battery charge. Each bit also 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, ing reliability and enhanced performance for demanding jobs. Model Number: 48-20-3918