The MILWAUKEE® SHOCKWAVE Impact Duty™ Carbide Hammer Drill Bits w/ Hex Collar use sharpened carbide to deliver up to 5X longer life in concrete and up to 2X faster drilling into masonry materials. Engineered with a precision ground tip, these bits deliver faster starts and less walking in concrete, brick and block. The carbide-tipped masonry drill bits' wide flute design removes dust faster, reducing heat and delivering more holes per charge. These bits are designed with an added hex collar, which ensures a consistent hole depth during every concrete screw install. Equipped with a 1/4 in. hex shank, the Milwaukee SHOCKWAVE Carbide Hammer Drill Bits are the ideal solution for drilling in masonry materials with both impacts and hammer drills/drivers. Optimized for use with the MILWAUKEE® Concrete Screw Installation Sleeve and Kit.