Robust carbide for up to 9x life in concrete Precision ground carbide tip design for up to 4x faster speeds in concrete Shockwave Impact Duty engineered for hammer drills and impacts Sharpened carbide edges for faster starts and less bit walking Wide flute design for fast, efficient dust removal and more holes per charge 1/4 in hex shank for added tool versatility Shockwave Impact Duty hammer drill bits available in diameters 1/8 in to 1/2 in