a system element for the transporting and positioning of a tool on a surface of a workpiece , includes at least one suction device that generates a suction stream , and a transport device that is arranged around the suction device , and includes : at least two rollers that are rotatably supported on the suction device , connection elements that interconnect respective end regions of various rollers , and the rollers and the connection elements are elastically deformable , and when there is a suction stream , the system element substantially conforms with the surface of the workpiece .