I'll say it straight away, unfortunately the Reer window and balcony door locking does not fit into this budget. That's why I can "only" awarded 3 stars. The balcony doors are equipped with lockable handles. Completing would be with the securing including no longer possible. The window with "normal" window handles have a very wide wooden frame. If the fuse is installed in the correct direction (locking mechanism toward glass), this can not be operated. The other way around, he does not.
I think that's a shame, because the principle of established handles I find very good. As a tip I can only give the assurance to try once before she procures for all windows and doors.