Sad to say the last socket outlet I replaced failed and burnt open, right at the embossed certification logo. They are approved but the manufacturers are just cutting material costs and using thinner and thinner material, and are generally just using poorer materials. The old 40 year old sockets fail only after thousands of cycles, but the newer ones fail with very few cycles, and with a load they fail sooner. The 3 name brand manufacturers here are all in the same cost cutting business, and the no name stuff is so bad that you basically will not want to use it.
I am not saying that you cannot get a good push in fitting, but that they are going to be a very hard to check item without destroying at least one per batch to see if they have been cost reduced but still look the same. You might find after a while the solid bar has become a folded shaped stamping, and then over time the metal is thinned out slightly. Plugtops here used to have 3 pins in solid brass, then a version came out with a steel nickel plated earth pin, then they started to drill back the centre of the brass, and now you get them rolled out of nickel plated steel for all pins. Rolled brass sheet on some, and this is very thin, barely capable of surviving insertion into a new socket, and often they are at the short end of the specification. Still have the same quoted current of 16A, but I personally would not trust them past 5A. The latest is a version that is an adaption of the Swiss socket, with a 3 pin socket with a polarising offset on the centre earth pin. Those at least are solid brass, and have an insulating sleeve designed in, so are a safer plug for insertion live. They are also compatible with a standard double isolated 2 pin plugtop, like a cellphone charger. That use is why I buy them, no 2 pin adaptors that mysteriously go missing every so often.
