I am building some kitchen shelves where two of the component panels need to be dropped in between permanently wall-mounted larger panels. I honestly can't think of another easy or flexible way to get them in place without metal French cleats. My builder thinks these will work well. The description says "picture hanger" but the weight rating for the 4-inch pairs I ordered is 50 pounds, which should be fine for these drop-in wooden panels that are around 2x2' and 18x30". If this goes well, I'll need a lot more of these.Review of HardwareX Supply French Cleat Picture Hanger, Heavy Duty Aluminum Z Clips with Screws (5 Pairs, 4 Inch)