Milwaukee 1/4" x 4" Carbide-Tipped Hammer Drill Bit exceptional durability and performance, delivering up to five times longer life in concrete and drilling up to twice as fast in masonry materials. This drill bit features sharpened, precision-ground tips that ensure faster starts and minimize walking when drilling into concrete, brick, and block. Its wide flute design efficiently removes dust, reducing heat buildup and allowing you to drill more holes per battery charge. This makes it an i choice for professionals seeking reliable and efficient drilling in tough materials. Model Number: 48-20-9010