Handheld Grout Saw is the perfect tool for cleaning and removing grout, thinset, mortar, calcium, rust and grime from grout joints. This is a great tool for cleaning excess thinset for tile joints before grouting. The Grout Saw can be used lightly on the surface to remove calcium deposits, rust and stains. The carbide steel also makes this tool effect for total grout removal to allow total regrouting.