vox, 
idk I’m not from the us but i think these are pretty common?
hole is just there for making production easier
setsneedtofeed, 
Would you say the lack of the hole is not very interesting?
JimVanDeventer, I mean, it’s also a Euro plug with US pins. I’ve never seen that mashup before. 🤷♀️
vox, oh,youre right, i kinda forgot us plugs are rectangular
JimVanDeventer, There is the occasional round one out there, but they wouldn’t have “the France hole”.
th3dogcow, 
hole is just there for making production easier
The holes allow the socket to grip the plug more firmly according to this page.
But, yes. These plugs are completely normal in Japan at least.
vox, technology connections made a video on it, none of the sockets actually use the holes, and ones that do, do it unintentionally
eth0slash0,
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