Abstract: The invention is related to a device far processing substantially flat workpieces, said device comprising a transport surface for transporting each of the workpieces through the device, and a processing unit, comprising of a processing element having an abrasive surface and being movable parallel to the transport surface in order to come into contact with each of the workpieces to be processed, a driving shaft and a carrier connected thereto for supporting the processing element, the driving shaft being tranversally positioned with respect to the carrier and the processing element comprising support members for supporting the abrasive surface, said support members being positioned at an angle of less than 90° with respect to the processing element, by which a multi-sided processing of the workpiece is achieved.