Rockwell RW8923 Sonicrafter Oscillating Multitool Triangular Carbide Grit Rasp Blade with Universal Fit System Use to rasp wood, hardened adhesives, and thin set Grind and etch masonry Aggressive material removal over larger areas Universal fit system adapts to other brands Blade Dimensions, 3.15 L by 3.0 W by 0.50 H Inch