For most windows and doors but this assurance goes well.
Installation is super easy. All you need is a screw Turn the screw on the handle to release.
The mechanism is simple and functional.
The daughter (2 years) gets the door at least not on its own.
The button is already relatively difficult to press. My wife had to start your difficulty.
In my view, the spring could be a bit weaker. (However, a matter of opinion ...)
Small side effect: It makes a little burglar-proof window / balcony door. -> Minimum additional protection ... ;-)
