Features and General Recommendations for Use ⏵ Universal for dry or wet cutting. ⏵ Material: Diamond sand coated. ⏵ The cutting Wheels are sharp and strong, making them perfect for cutting glass, fiberglass geramics, porcelain, tiles. ⏵ It is extremely durable, so retains it shape and does not break. ⏵ Good shape retention, strong grinding capacity, precision machining and high grinding efficiency.