Milwaukee SDS-PLUS MX4 5/32" X 4" X 6" drill bits are designed to deliver exceptional performance and durability in concrete and masonry applications. Featuring a solid head carbide construction, these bits provide up to five times longer life when drilling through concrete with rebar. The innovative 4-cutter MX4™ design includes rebar guards to maximize durability and prevent lock-up, reducing downtime during tough jobs. A sharp centering tip ensures precise spot drilling on concrete and metal decking, while variable flutes efficiently remove dust, reduce heat, and allow for 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 requirements, helping users maintain optimal performance and safety. Model Number: 48-20-7308