The Milwaukee MX4™ 4-Cutter SDS PLUS Rotary Hammer Drill Bit (3/16" x 4") is engineered for professional electricians and contractors who demand performance in tough concrete and masonry applications. Featuring a solid carbide head with a 4-cutter design, this bit prevents lock-up in rebar — keeping your crew productive and minimising downtime on the job site. Variable flutes evacuate dust faster, reducing heat buildup and delivering up to 20% more holes per battery charge. The sharp centering tip ensures precise spot drilling in concrete and metal decking, while the built-in wear mark indicator signals when the bit no longer meets ANSI standards — so you always know when it's time to replace. Ideal for concrete with rebar, masonry, and metal decking, this bit is a reliable choice for both rough-in electrical work and structural drilling tasks.

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