The outlet caps are very convenient. The only problem that I see is that our little girl has quite a fun, To pull plug from the socket, and then the outlet is no longer ensured. That's why we use for sockets in which permanent a plug in it, which fuses the glue reer 3246.010 - Steckdosenschutz know for reinlegen 10 pieces into the outlet, for all other such super-practical outlet caps, as they appear to me more secure than the other / glue / screws ....