Dremel 3-1/2" Ultra Saw Diamond Tile Cutting Wheel is a dry cut only wheel with a 5/8" - 7/8" - 20mm arbor diameter. It is a single direction wheel and is compatible with Dremel tools. This wheel is ideal for cutting ceramic tile, porcelain tile, and natural stone. It is also suitable for use on glass and metal. The Dremel 3-1/2" Ultra Saw Diamond Tile Cutting Wheel is a powerful and versatile tool that can be used for a variety of projects.