A-SYNCHRO mechanism with max. 20° inclination (+10° ÷ -10°) of the backrest and 20° inclination (+5° ÷ -15°) of the seat. The tension of the backrest can be adjusted according to the user’s weight by turning the side handle. Both the seat and the backrest are equipped with an anti-shock system, which allows the backrest and the seat to be easily locked in 5 different positions through an innovative and patented cable system that makes the mechanism easy and quick to use, improving the final design of the chair. The cables can be either installed on the left side or on the right side of the seat, so as not to interfere with levers or armrests.