Rockwell RW8924 Sonicrafter Oscillating Multitool Carbide Grit Finger Rasp Blade with Universal Fit System Use to rasp wood, hardened adhesives, and thin set Grind and etch masonry Aggressive material removal for small and hard to reach areas Universal fit system adapts to other brands Blade Dimensions, 2.85 L by 1.45 W by .30 H Inch