Kerbs are used to delimitate sidewalks, flowerbed s, stairs and steps, covers as well as to delimitate surfaces and floors. They are parallelepiped-shaped with a head (upper face), two sides - one of which is generally visible -, a foot (bottom face), and finally two joints which correspond to the lateral conjunction faces. It is possible to create curve shapes other than linear shapes, thus a greater aesthetic content can be obtained. To let rainwater flow, a cavity with milling machine is made according to the size desired by the client.