Diamond Contour Blades are designed for creating or cutting Sink or Vanity holes where any Curve application is required. Contour Blades are mainly used for cutting Granite or Marble, but can be used on other Stones. They are easily recognized because of their Concave Shape. Contour Blades can be used for Dry Cutting, even though using water will not only increase efficiency but reduce dust and increase the lifespan of the Blade. It is recommended to use these blades with Angle Grinders.