Long seen not sooo bad processed plug. The housing rattles and shakes. American plug hold true, however, was all so insecure structure. that I have left the adapter unattended into a power source.
I was very glad to have bought for my Canada trip a wertigeren adapter.
The only good thing: This thing does not have this as usual third metal strand. This proved to be very convenient as most extension cords in Canada only so had a 2er connection.