Bomb Slot

A typical Bomb Slot

Bomb Slots are devices that appear throughout the Metroid Prime series. These devices are used to activate various devices throughout the planets that Samus explores. To activate a Bomb Slot, Samus must go into the slot while in the Morph Ball, and then use a Morph Ball Bomb. Depending on the function of the Bomb Slot, they may or may not be usable after their initial usage. Samus generally cannot escape a Bomb Slot once she has been pulled into one until she bombs it. These devices are known to be used by the Chozo, Luminoth, Galactic Federation, and Space Pirates. It was likely Chozo technology and it was spread around to the Federation and Luminoth and stolen by the Space Pirates.