Locker

Lockers are devices that bothe store Beacon students' weaponry and also jettison them to missions and assignments.

Jaunedice
When Glynda is introducing the students to the locker's rocket functions, Cardin Winchester locks fellow student, Jaune Arc, into them and launches it.

Trivia
The combined purpose of storing weapons and launching to missions is similar to the ODSTs of Halo fame.