Sten & Lex have been doing stencils on the street since 2000/2001 and today their work is part of the urban landscape in London, Paris, Barcelona, New York City and their home town of Rome. During that early period in Rome and Italy in general there wasn't a strong stencil culture such as there was in France and Sten Lex are seen by many as the pioineers of Stencil Graffiti in Italy and were the first to be considered stencil artists. The duo are best known in the history of stencil making for introducing the halftone stencil technique in which the greater part of their stencil portraits is composed of thousands of lines. They usually produce portraits of anonymous people they have pohtographed themselves or found in family photo albums.