The fanlight openers are used to tilt the widow sashes, which are mounted in not available places -they can't be open and close by a handle, mostly they are too high to reach them. Operation: by lever handle, pivoted lever, lever with transmission or spindle drive.
Additional locking arrangements for high bottom-hung windows, fitted on sides. An additiona side locking is recommended for the sashes more than 800mm height.
A flexible rod is used to avoid a windowsill or a ledge and for an atypical constructions.