Hidden fixed bracket-Can be used for DIY or custom wall shelves, completely hidden in the wall and wooden boards, simple and stylish, making your home more beautiful and orderly. Material-The interior of the floating shelf bracket is made of iron, and its shell and expansion tube are made of plastic. Fine workmanship, sturdy and durable. Size-The total length is 175mm, the expansion tube length is 75mm, the diameter is 12mm, the support rod length is 100mm, and the diameter is 10mm High stability-The support rod is a hexagonal cylinder with barbs, which increases the obstruction of the board and improves stability. Strong load-bearing-The load-bearing capacity of the wall-mounted shelf bracket is very strong. If properly installed on a suitable fixed brick wall, the bracket can withstand about 20 kg. Product Description [Name]: Wall-mounted hidden nail bracket for floating shelves [Material]: Metal (Iron) + Plastic [Color]: Brown [Size]: 10mm x 100mm [Dimensions]: Total length: 175mm Tube length expansion: 75mm, diameter: 12mm Support rod length: 100mm, diameter: 10mm [Package]: 6 x Hidden floating shelf bracket The plate bracket can support and fix various wall-mounted shelves, such as bookcases, display racks, garage racks, decorative racks, bathroom racks, shoe racks, etc. It can definitely meet your different DIY wall shelf designs. Installation steps: 1. First measure the hole spacing and drill holes in the wall. The depth of the hole should not exceed 75mm. 2. Insert the expansion end of the bracket support pin into the hole in the wall with a black nut at the end. 3. Insert the support rod into the wall hole expansion plug. Once the end of the screw is properly in contact with the nut and tightened clockwise, continue to rotate until the expansion plug inside the wall expands to fully support the wall. 4. Then drill holes of corresponding size on the side of the board (according to the hole spacing of the wall). 5. Finally insert the board into the board support rod. Note: 1. You need to prepare a 12mm drill bit for drilling holes in the wall and another 10mm drill bit for drilling holes in the wood. 2. Remember to put the central silver metal ring on one side of the expansion tube and embed it into the wall. 3. Each board must have at least 2 supports