WARNING, THIS IS A HOBY MADE DESIGN THAT IS ONLY MENT TO MAKE IT HARDER / SIGNAL THAT A POWER OUTLET SHOULD NOT BE USED. IT IS POSSIBLE TO REMOVE IT BY HAND IF YOU ARE STRONG.

This is a EU/Russia power plug blocker that blocks off power outlets. 

Its made to be hard to remove by hand but can be removed by using a 4 mm thick metal rod thru the hole in the side,  like allen key that comes with most printers. 

I printed my design in PLA but PETG and other hard filaments should be fine.