SIT is the leader in design and production of a vast and complete range of couplings that include torsionally rigid couplings, flexible couplings, zero backlash couplings, toothed couplings, couplings with shaft, bellows and disc couplings or to the client’s own design. ?A product capable of meeting the most demanding power transmissions with the absolute guarantee of quality. Couplings certified in accordance with the ATEX 2014/34/EU directive are available on request.