@phos I know next to nothing about "hardware". If have time, can you, please, tell what for would you use it?

@CryptoLek when you experiment with new circuits, you often start out with a breadboard, a grid of holes to plug components in that are connected in rows. Once you have a design figured out a bit more you may want to actually solder it down to have a more secure/permanent connection, so various boards with rows of holes in different arrangements exist. I also very much like the SMA edge connectors on top as they allow easy connection of a variety of different cables in the lab.