Cilps pour testeur électrique.

thingiverse

We all have only two hands, and checking if a socket has electricity in it can be pretty tricky. A really simple gadget with space for type C, E, and F plug sockets is just what we need. These types of sockets are used in almost a hundred countries worldwide, including France, Belgium, Morocco, Tunisia, Germany, Bosnia and Herzegovina, Finland, the island of Bali, and many more.