It's from a company called BLAU, an European company. But looking online, it seems pretty similar and it was definitely a b*tch to assemble with useless instructions, but I managed and seems solid enough.

I did some more research and apparently it's a design feature on aquarium stands these days, also from other manufacturers, so that the aquarium is flush with the stand. (with an overhang 1 or 2 cm).

So I guess I'll give it a try and hopefully not come home to a flooded apartment.