Since they are produced from thick, flat quarry slabs, kerbs always have the external side with natural surface and have good finishing on one side. The possible finishing for the head ranges from the simplest and cheapest shearing to the finest quality finish and shaping, starting from a sawn or machined. Kerbs may also be produced with different curves or cuts (vents) for the outflow of water. Laid vertically or flat kerbs border pavements and paved areas. Laid at a height above the finished surface they are used to contain ground with flower beds or inclined planes. After undergoing certain types of processing they can be used for the fitting surface floors and stairways at different heights. The wide range of varieties produced broadly meets all usage needs.