Milwaukee SDS-PLUS MX4 3/16" X 10" X 12" drill bits feature a solid head carbide design that delivers up to five times longer life when drilling through concrete with rebar. These bits are engineered with rebar guards for maximum durability in tough aggregate and rebar conditions. The innovative 4-cutter design prevents lock-up, reducing downtime and improving efficiency. A sharp centering tip ensures precise spot drilling in both concrete and metal decking. Variable flutes help remove dust faster, reducing heat buildup and allowing up to 20% more holes per battery charge. Additionally, a wear mark indicator signals when the bit has reached the end of its life and no longer meets ANSI standards. These MX4 4-cutter drill bits are i for heavy-duty concrete with rebar and masonry applications, making them a reliable choice for professionals. Model Number: 48-20-7314