... , rock, artificial stone, and breeze blocks Masonry Drill Bits, milled* made of high carbon steel with industrial ... reduced breakage.* for use with percussion drills.* for drilling in masonry, concrete, rock, artificial stone, and breeze blocks. DShank SizeLengthSizeMiddle ShankShankShank ... .59.5 121311.51030141513161714.5131815.31916.52017.321182219.3232024212521.5 Masonry Drill set