Based on the consistently positive reviews I've ordered these outlet protection. The idea is great - the sockets are protected. To pull out you do not need keys or whatever else, but the two slots in the cap close to the right because you just rotate the plug in and thus pulls out this protection. Everything easy. Then why only one star? I have this protection unfortunately easy to pull with two fingers. This means babies with even smaller fingers can easily remove him. Possibly this is due to our outlets, Berker Q3 and K1, in any case the product at least not met with us their purpose.