sia Abrasives based in Frauenfeld has maintained its position as the third largest supplier of flexible abrasives for years. It develops, manufactures and markets complete abrasive systems tailored to specific requirements and applications for surface preparation and finishing of all kinds. This commitment has made abrasive processes into true surface technologies. sia Abrasives is a member of the Power Tools Division of Robert Bosch GmbH and generates more than 90% of its sales outside Switzerland with a workforce of some 1,250 employees worldwide.