I have this Steckdosenschutz now installed throughout the house. We have outlets of Jung. Simply existing screw rausdrehen, push in plug covers and fasten with the screw. If an outlet protection falls apart, as here partly described in other reviews and what can happen the way only when removed, there is absolutely no problem this again shortly assemble (about 5sec), maintain proper function. This is just the simple structure of protection. Of course, the reason is not optimal, four stars.