Protects against dangerous electrical accidents and their consequences. Childproof: Unlocking is only possible with plug pins. Automatically closes when the plug is removed. Secure hold: Fastened with the screw of the socket. Easily removable without a trace - ideal for rental apartments. Suitable for all common sockets from various manufacturers. Contents: 20 pieces. Please note: The length of the screws varies depending on the socket model, as there is no uniform standard. However, you can purchase suitable longer screws at electrical and construction supply stores. Please ensure that the installation of the socket protector is done correctly for your safety and that of your loved ones.