Rockwell RW8925 2-1/2-Inch Sonicrafter Carbide Grit Semicircle Saw Blade with Universal Fit System Use to remove grout, porous concrete, and masonry Grind, etch, and score masonry Semicircle shape with flat side allow for easy access into corners and flush against adjoining surfaces Universal fit system adapts to other brands Blade Dimensions, 2.5 L by 2.0_watt by 0.5 H Inch