This device for the treatment of surfaces is specifically conceived as an addition to motor-driven hand tools. Routing means are used for routing the order to a destination based upon the determination made by each of the filtering means. Such PU-systems preferably further comprise at least one phosphorus-containing compound, most preferably a phosphorus-containing plasticizer, which is preferably halogen-free. Finally, the present invention provides functions for making a quick determination as to which, if any, of a potential thousands of image models within a searchable database exhibit a desired level of similarity, as compared to a target image model. The weight is a sphere having a smaller diameter than the coil spring.