A Ball Clamp (as named in the Metroid Prime internal data) is a locking mechanism used by the Space Pirates in two rooms far into the Frigate Orpheon, Cargo Freight Lift to Deck Gamma and Reactor Core Entrance. By placing a spherical object in a hologram, the door to the next room will open. Samus can roll into the clamps with her Morph Ball to unlock the clamps. Interface Modules must be scanned before either clamp can be used.
Ball Clamps appear twice in Metroid Prime 3: Corruption as well, first in the Podworks after the circuit boards are repaired. This clamp is situated on top of a piston, which is used to leave the room. Another one appears in the Security Air Lock, where it is used to twist a mechanical gate around.
- "This device does not seem to be functional. There must be something nearby that will turn it on."
- "It looks like a spherical shape would fit into this clamp."
- Exactly how the Pirates unlocked doors with these clamps is unknown.
- The same hologram indicating Ball Clamps is used for Kinetic Orb Cannons.