A tool used to cut fabrics, looks a bit like a pizza cutter. Consists of a handle and a thin round blade, which is razor sharp. Must be used with caution and kept out the reach of young children. For safety reasons and to extend the life of the blade it should only be used with rotary cutting mats and rulers. There are several manufactures with different handle styles and sizes. They come in 3 sizes, small, medium, and large.