The PIN ROLLER system is a reference point that bypasses all the usual problems in construction. It offers reduced friction with zero wear at the point of contact with the shaft while simultaneously distributing the load received from the shaft to 3 points.
Two contact points in the cassette and one point on the hook which now receives a small part of the applied pressure and not 100% of it. Thus, the hook exerts much less pressure at the point of contact with the trigger, resulting in the pressure we apply to the trigger to release the shaft being much lower than that of a classic inverted mechanism.