It's hard to say for sure. There are a lot of different brands for this kind of socket holder.
And what exactly are you contributing to the conversation? All I am trying to imply is that if the manufacturer is in China, it's not going to be that easy to figure out. If it is USA made, there are only a handful of companies that make socket trays.Why post if it isn’t helpful to the OP, and if you don’t know the answer?
About 90% of what people post here isn’t helpful and usually doesn’t answer the question being asked.