Milwaukee SDS-PLUS MX4 7/8" X 16" X 18" Drill Bits with solid head carbide are designed to deliver up to 5 times longer life when drilling through concrete with rebar. These drill bits feature rebar guards that maximize durability in tough aggregate and rebar, combined with a 4-cutter design that prevents lock-up and reduces downtime. The sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes efficiently remove dust, reducing heat buildup and allowing up to 20% more holes per battery charge. Additionally, a wear mark indicator signals the end of the bit's life and when it no longer meets ANSI requirements. These MX4 4-Cutter Drill Bits are i for heavy-duty concrete with rebar and masonry applications, providing reliable performance and durability. Model Number: 48-20-7236