Milwaukee SDS-PLUS MX4 3/4" X 16" X 18" Drill Bits with solid head carbide deliver up to 5 times longer life in concrete with rebar. These drill bits are engineered with rebar guards to provide maximum durability in hard aggregate and rebar. Featuring a 4-cutter design that prevents lock-up, they reduce downtime during use. The sharp centering tip ensures exact spot drilling in concrete and metal decking, while variable flutes efficiently remove dust faster, reducing heat and enabling up to 20% more holes per battery charge. A wear mark indicator shows the end of life and when the bit no longer meets ANSI requirements. The Milwaukee MX4 4-Cutter Drill Bits are i for concrete with rebar and masonry applications, making them a reliable choice for demanding drilling tasks. Model Number: 48-20-7220