Rockwell Sonicrafter RW8923 Triangular Carbide Grit Rasp BladeThe RW8923 Carbide Rasp when used with the Sonic rafter, is great for rasping wood, cutting hardened adhesives and thin set, and etching or rasping masonry. The coarse grinding and rasping makes it aggressive at material removal over larger areas. Highlights: For coarse grinding or rasping and aggressive material removal over larger areas Use on wood, hardened adhesives, thin set and masonry Triangular carbide grit Universal fit system allow accessory