Milwaukee SDS-MAX MX4 1" 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. These bits are engineered with rebar guards to provide maximum durability in hard aggregate and rebar environments. Designed with sharp centering tips, they ensure exact spot drilling in concrete, while the integrated 4-cutter design prevents lock-up in rebar, reducing downtime. Optimized flutes efficiently remove dust faster, reducing heat and enabling up to 15% more holes per battery charge. Each drill bit includes a wear mark indicator to show when it no longer meets ANSI requirements. These drill bits are i for concrete with rebar and masonry applications, making them a reliable choice for demanding jobs. Model Number: 48-20-3956