PORTER-CABLE PC3031 Oscillating Carbide Rasp Carbide grit coating aggressively removes material such as grout, plaster and other masonry surfaces Tool free fitment allows users to change accessories quick Ideal for removing grout debris and remaining thinnest Carbide grit coating aggressively removes material such as grout, plaster and other masonry surfaces Tool free fitment allows users to change accessories quick Ideal for removing grout debris and remaining thinset