Another gate appears in Security Air Lock. It is locked in place by a lock system that can only be disengaged with the X-Ray Visor. This visor allows Samus to shoot all five locks when they flash red. Once the gate is unlocked, yellow circles appear where the locks were, and a Ball Clamp appears at the base of the gate. A Missile Expansion can also be collected here. Using the clamp twists the gate around and releases Samus, who can then enter the Lift Hub from the first floor.