Breu Diamantwerkzeug GmbH is a company with headquarters and one production site in Arbon / Switzerland, and another production site, Breu do Brasil Ltda., in Indaiatuba/SP (Brazil).

Originally the company was founded as RBD Diamantwerkzeuge in 1994 by Rudolf Breu († 2014), producing high – quality diamond and CBN tools. In 1996 the company name was changed to Breu Diamantwerkzeuge GmbH. Since the start in 1996 with four employees, the development of this family – owned company was stable and continuous. In January 2002 the production was moved into the newly built factory in Arbon / CH.

In 2007 the decision was taken to expand to another production site in Brazil. The Breu do Brasil Ltda. started production in November 2008. Due to the rapid increase in turnover and good future prospects the decision to expand and change to a new location was taken. In 2015 the move into a new production site was performed.