This looks like a great way to keep your tools in a box. The problem is if you open it from the wrong side, everything falls out. This was my late brother's tool box and as I opened it a few months ago, I lost it all. The left side is metric and the right side is standard sizes. So today I opened it up and I began to put it back into place.
It took almost two hours of time. I had to remove my glasses so I could read the side of each one of the sockets, turning them carefully to get to the side that identifies the size. The sizes are then marked in the plastic holder which also required me to look very closely to read the numbers.
I was going to take it to the basement, then I changed my mind. If it goes down there I will never use them. The case with tools is headed for the back of my car so I always will have the tool I need to fix anything.