●●●The instruction is the 4th and 5th picture, please read it before instralling it. A lot of customers install it in random ways and then wrote bad reviews later, still you can get refund easily but it's not cool
●●●2018.5.28 update: Now we have updated the design by using a flange to support the wood board, it may take more time to install but it will be more stable to support heavy stuff.