Diamond cutting disc Extreme Silencio D.400mm 20mm for cut-off saws 4800 min-1: Residential areas, city centers, schools, and hospitals are particularly sensitive to noise development. Additionally, local regulations regarding excessive noise are becoming increasingly common. With segments up to 17 mm high and a tailored solution for every application, the Extreme Concrete Silencio is our most efficient diamond disc for granite, concrete, and general materials, while simultaneously protecting the environment from disruptive cutting noises. Winner of 10 innovation and safety awards worldwide! The tool features two patented technologies: the "sandwich" steel core configuration, which absorbs the vibrations of the two steel halves, and patented water channels that prevent disruptive wind noise. Each Silencio diamond disc is optimally tuned to achieve the best possible noise reduction and cutting performance during use.