NOTE: The screws must be driven into the wall studs.If the position of the wall studs is uncertain, we strongly recommend you buy a header board from local lumber retail. A 1x4 in clear pine, poplar, or hardwood is recommended. Insert the provided anchors and carriage bolts (with washers).Unscrew and separate the carriage bolts and anchors , and take care to install correctly securing with a wrench.