Jürgen Hierold: Yes, you need an extremely flexible screwdriving system to execute flowform fastenings. For example in car bodies hundreds of screws have to be positioned and, because of the various materials, shapes and sheet thicknesses used, these need to be tightened to different torque parameters. A crucial quality characteristic here is that of achieving the specified torque and rotation angle values. If the conditions at the screw-in position change - for example a different materials pairing, sheet thickness or the screw geometry - then the thread-forming torques usually alter too. To be able to execute every screw fastening with a single screwdriving system, in some circumstances it is not enough to check the traditional torque and rotation angle parameters.