An F-plug is a type of plug used in some countries, particularly in parts of Europe. It's also known as a Schuko plug, named after the German standard “Schutzkontakt.” The F-plug has two round pins with two metal plates on the side for the grounding function. This type of plug is used for sockets with two round contacts and a grounding contact.

The F-plug is mainly used in countries like Germany, Austria, the Netherlands, Belgium, Luxembourg, Poland, and various other European countries. It is a common type of plug for household appliances and electronics with higher power requirements.

It's important to note that the F-plug is not the same as the G-type socket used in the United Kingdom. Although they both have round pins, the placement of the pins and the grounding function differ between these two types.

If you travel to a country where F-plugs are used, it is important to ensure that you have suitable plugs and adapters to safely connect your electronic devices to the sockets.