This Supercut inspired Diamond blade design will remove tough grout from between tiled surfaces. Efficient shape allows aggressive grinding without damaging the tile. Long-lasting blade enables continuous work on large projects. For commercial applications such as cutting out marble and trass concrete joints. Also for sinking ducts in plaster, brick, pumice and honeycomb stone as well as autoclave aerated concrete. These premium, long lasting blades are designed specifically for harder grouts.