Paint rollers are one of the most commonly used tools for painting, they are suitable for  home and professional use. 

Working with paint roller is not as precise as with a brush, but in contrast to that it is much faster, efficient and with lower cost of paint. Rollers are used for painting relatively large surfaces with a variety of features – from rough and uneven (as external renders and wall areas) to smooth and even perfectly smooth surfaces (such as fine gypsum plaster, pre-treated with a special primer)