The basic module with the possibility of screw connection of both torsion springs. With a series connection of both torsion springs, the double torsion angle can be achieved while maintaining the torque. With a parallel connection of both torsion springs, the double torque can be achieved with a simple angle of rotation. Up to type 7, continuous screws (grade 8.8) and from type 8 directly the threads in the inner part are used. A simple connection from the inner part to the machine structure is provided by the type MA mounting bracket. The housing can be fastened with screws (quality 8.8) to the structure of the system.