I didn't need anything big either.
These are holding
a portable tire inflater
extra winter layers
and there is still room for more.
the small part is cordoned off and a sliding tray keeps small stuff separate.
The lid locks and the whole box swings and is lockable to the bed yet easily removable. Although I've had a big old stove back there since I've had em in and nothing got in the way.
Took em through a touchless car wash with the power spray and the inside stays completely dry.
But if you want cheap, that box looks good. Just gotta see how weather proof it is since it doesn't say. And it might help if you grabbed a couple small item organizers to keep certain things accessible.