Rockwell RW8926 2-1/2-Inch Sonicrafter Oscillating Multitool Diamond Coated Semicircle Saw Blade with Universal Fit System Use to remove or score ceramic and stone tile, and backer board Grind, etch, score, and notch plaster, porous concrete and 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