SB10O 63mm Semi Round Electroplated Diamond Grout Blade, 8mm Offset Mount Fits Multimaster, Rockwell, Sonicrafter, Oscillating Tools - 10/Pack. Semi-Round diamond grout removal blades will effectively remove grout joints during tile repair tasks. The diamond coated surface outlasts carbide grit versions 10 to 1 and can be used for grinding and limited cutting of material such as glass, tile, ceramic as well as brick and masonry materials. The semicircular design allows the blade to access right into corner without damaging over cuts. Features: Use of diamonds greatly extends the life of the blade Blade shape allows access right into corners Perfect For grout removal Specifications: Material: Diamond Application: Fiberglass, Plaster, Porous Concrete has been a factory direct distributor of power tools, accessories, fittings and shop machinery since 1986.