The stay arm is attached to the stay arm connecting plate this way it is fixed more firmly to the frame and the number of article codes is reduced.
The stay arm is clipsed in the tilt position, this way the sash can not be accidentally smashed by the air currents

The stay arm has an integrated wrong operation safety device in order to prevent
The stay arm is universal left and right, 9/13 mm the accidental maneuvering of the sash from the tilt position in the turn position.
The horizontal adjustment of the sash ( -2 / + 3 mm) can be made by using Allen key positioned in the stay arm. It is made of steel parts, if exceed adjustment the screw won’t break.
The gasket pressure can be adjusted (-0,8 / + 0,8 mm) by using Allen key.
Thanks to special support part on the stay arm, the movement of the middle lock is limited right-left or up-down.