You don't need to with a magnet. As a matter of fact those rear ones, you need to drop in the socket, then extension, the another extension, then wrench. None of those wrench pieces can be connected, it just won't pass through. Then take apart the contraption, and use magnet to pull up the parts. Search my name and spark plugs. I wrote it out a bit.

Sorry for the hijack CNC, just adding on to your vid.