The Milwaukee 48-20-8432 MX4 4-Cutter SDS-MAX Rotary Hammer Drill Bit is engineered for heavy-duty drilling in concrete with rebar and masonry. It features a solid carbide head that provides up to 5x longer life and integrated rebar guards for maximum durability in hard aggregate. The 4-cutter design prevents lock-up in rebar, while the sharp centering tip ensures exact spot drilling. Optimized variable flutes remove dust faster to reduce heat and increase efficiency, especially for cordless tools. This 3/4-inch diameter bit has a 16-inch drilling depth and an overall length of 21 inches, meeting ANSI specifications for common anchor fitment

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