No it's for a kitchen I'm fitting as part of the extension we're doing.
I've got two cables running to a 2gang socket inside a base unit and the hole needs to be big enough to pass the three-pin plugs through. Rather than just cut the hole and leave it bare, I want to finish it off with one of those thingies.
The chances are once a few kitchen doofas get put in the cupboard no one will ever notice it, but I know it's there and it's all about attention to detail