Chris Baylor. One quick and easy way to mount a cabinet onto a wall is through the use of a wedge bracket called a French cleat. For instance, when I built the utility cabinets in the article entitled Cabinets 101, I showed how to use a very strong French cleat wedge bracket to mount the cabinet on the wall. A French cleat is simply a piece of dimensional lumber (the length of the cabinet) ripped in half on a table saw at a 45-degree angle.