Perfect hideconcealed shelf bracket to support custom concealed shelf floats, stylish storage solutions that make your home more beautiful and organized. Strong load-bearing capacityproperly attach suitable fasteners to the studs of a massive solid wall or cavity wall. the maximum load capacity of the bracket can reach 20 kg. High quality materialsthe interior of the floating shelf is made of hardened iron and the expansion tube is made of plastic, good workmanship, durable. High stabilitythe concealed mounting frame can be mounted on wood products or masonry walls, the support bar is a hexagonal barbed cylinder that increases the obstacle for the board and improves stability. Wide range of applicationsconcealed shelf bracket It can support and fix various wall shelves such as bookshelves, retail shelves, bathroom shelves, shelves, etc. Feature: - The load-bearing rod is a hexagonal column, which can increase resistance well and will not shake. - Usually used for DIY or custom wall shelves, bookshelves, hidden in the wall to save space. - Made of iron threaded pipe and ABS plastic, it is durable and beautiful in appearance. Installation steps: 1. First measure the hole distance and drill the hole. the depth of the hole should not exceed 72 mm. the hole in the wall corresponds to the depth of the hole in the board. 2. Insert the expansion tube into the wooden hole and fix it. Insert the support rod into the expansion tube and tighten it clockwise until the expansion tube is fully expanded. 3. Insert the support rod into the wall hole and fix it. If you lack tools, please find a local handyman to install them. .Each rack can hold 15 pounds. for heavier racks, please add additional racks to distribute the weight. Specification: Material: metal (Iron) + plastic Size: as shown Color: brown Weight: 300 g Quantity: 8 Package Include: 8 * Hidden brackets Note: 1. You need to prepare a 12mm drill bit for drilling holes. 2. Each board must have at least 2 invisible brackets and be kept in the same horizontal position. 3. Remember to place the middle silver metal ring on one side of the expansion tube and embed into the wall.