RUBI polishing pads are specially designed to work on dry, natural stone surfaces, especially granite and marble and cured concrete. Our polishing pads offer the construction professional excellent finishes on any flat surface and in beveling marble and granite, other natural stones and cured concrete. The 1500 and 3000 grit polishing pads are the finest and recommended for final polishing work. Their maximum operating speed should not exceed 3,000 rpm. RUBI is committed to quality. All our products and tools are subjected to rigorous quality tests by experienced professionals. We want all the products we have on the market to be recognized for their quality and durability. This desire has made our brand one of the most highly valued in giving quality solutions to tile installing and building professionals.