Development of an innovative tightening head based on a slow-speed pneumatic motor that allows packaging to be screwed on at the exact torque set, while meeting all ATEX requirements. The precise three-jaw closure retention system allows torque transfer of up to 210 Ncm for a 24mm diameter nut without destroying the closure. The use of standard components from leading pneumatic companies allows for fully trouble-free operation, and in the event of damage to these components as a result of an unintentional collision, allows for quick replacement due to full availability.