One of the main differences between the Wall Locker and the normal Locker is its ability to be wall mounted and to come with customable text options. They have (5x6) thirty item slots, and attempting to deconstruct a Wall Locker that contains items is not possible, resulting in a notification that the container is not empty.
How to customize label
Build the small locker.
Click on the "LOCKER" text.
Enter the desired text (ten character limit).
Click on the lower white circle to cycle through text colors