... nickel or titanium are available Plated Grinding and Cutting Disc for Marble Concrete Features: 1.Diameter:100mm--600mm available 2 ... Coating: Nickel, chrome, titanium available 6. Smooth cutting surface, fast cutting speed, high efficiency, low noise and long working ... lifetime.7.Usage: Suitable for cutting and grinding various hard materials, such as marble, concrete,brick, granite, glass, ...