A French cleat also called a split cleat is a traditional method for hanging projects like a wall shelf or a clock. It also works well when hanging tools in your shop, because the French cleat makes it easy to move your tools around. In my opinion it’s a worthwhile technique to learn. He does it all with hand tools which is fun to watch and gives the video a relaxed feel. The French cleat doesn’t need to look pretty as it is in the back where no one will be seeing it.