They are Power Fist boxes which is Princess Auto's brand name. PA is only in Canada but I believe Harbor Freight offers something similar. Like Pelican boxes they come in several sizes.
https://www.princessauto.com/en/44-1-2-in-impact-resistant-tool-box/product/PA0008725384
One of those boxes will be a permanent fixture on the front of a tear drop trailer I'm currently building.
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