This product comes without instructions! You have to guess what size hole to drill. If you drill a hole too big, it will come loose from the wall once you start sticking your brooms, shovels, or whatever you bought it in. They give you screws, gaskets and caps but they don't tell or show you how to assemble them. I give them about a month to stick on the wall. It is finally torn off the wall by pulling on the brooms and mops. I wouldn't buy this product again if they paid me for it!