Concrete masonry units (also known as paving stones, concrete blocks, paving stones, Interlocking Pavers Tiles, Interlocking Paver Block, Paver Block, Paver Stone, Paver Moulds Paving Stone) are used for the installation of driveways, access roads, parking lots, streets, plazas, shopping malls, walks, patios, pool decks, floor-to high-quality and other smooth surfaces. They are also inclined to prevent paving highway or railway under-class separate structures or other steep slopes to erosion, especially where grass does not grow to protect the surface. Grid pavers are used, which reduces stormwater runoff is desired. Pavers are manufactured in a variety of shapes and colors and are relatively easy to install with only a few tools.