hyperman:

 

As it says....

 

It is a specialized 20A rated plug commonly used in commercial setups to run lots of power points from one outlet.

 

for example we have them at my work for running lots of laptops for displays

 

Thanks! That would make sense. They are below tables where plugs could be for people to charge their devices

more commonly known as a "starter socket", typical socket for retail displays etc...

gregmcc:

 

more commonly known as a "starter socket", typical socket for retail displays etc...

 

 

 

or specifically (as I found out) a WIELAND GST

I used to have to deal with these on a regular basis, very good when you need to daisy-chain plugs around things like a large conference table setup.