Ideal for creating fine surfaces on granite, building materials, artificial stone and concrete.; The surrounding turbo grinding ring enables fine grinding results for finishing work.; Also works great on edges and corner without breakage.; Optimal use - basalt, old concrete, stone concrete pipes, granite, hard casting forms, sof clinker stone, bricks, natural limestone, natural slate, poroton, porphyry, quartzite, travertine, and cement fiber boards; May be used on - screed concrete, aerated concrete, soft limestone, hard limestone, plaster mortar, sandstone, and slag stone