Socket wrench for BNC connectors

Recently I had to unscrew many BNC connectors to be able to replace some of them.
I have some socket wrenches in my toolbox but unfortunately not the required dimension for this connector type.
Since the hardware store was already closed and I would have to wait until Monday, I decided to design a matching socket wrench myself and this thing is a result of this decision.
Using this thing I was able to unscrew all BNC connectors.
The walls of the socket are not very thick since I wanted to be able to unscrew connectors mounted very close to each other (->picture).