Went through concrete with ease. This reviewer rated product 5 out of 5 stars. Had to tear out a closet, one side sheet rock, the other side some kind of paneling with cloth fibers. Nothing was cutting through the wood. Went to Lowe's to see what I could fine. Ended up getting the Diamond Grinding Wheel.
3 inch grinding wheel designed for use with miniature grinders. 3/4 inch wide, 120 grit. 10mm : This grinding wheel is a direct replacement for item #60735. Grinding Wheel for Miniature Grinders, 3 Inch Diameter, 120 inch grinding wheel designed .