Paving stones, also known as SETT, are flat stones used to create a hard surface for roads, pathways, and patios. They are often used in place of asphalt or concrete and come in a variety of shapes and sizes. FLAGS are a type of paving stone that is rectangular in shape and has a textured surface. COBBLE is another type of paving stone that is rounded and has a smooth surface. Paving stones are an attractive and durable option for outdoor surfaces.