Hidden Mounting Brackets- Can be used for DIY or custom molding, completely hidden in walls and boards, simple and fashionable to make your home more beautiful and tidy. Material- The inside of the floating shelf bracket is made of iron, its body and expansion tube are made of plastic. It is fine workmanship, sturdy and durable. Dimensions- The total length is 195mm, the expansion tube length is 75mm, the diameter is 12mm, and the support rod length is 120mm, the diameter is 12mm. High Stability- The support rod is a barbed hexagonal cylinder that increases the board's obstruction and improves stability. Strong Bearing Capacity- The bearing capacity of the wall shelf bracket is very strong. When properly installed on a suitable solid brick wall, the bracket can support approximately 20kg. [Name]: Heavy-duty wall mount skinnail mounts for floating shelves [Material]: Metal (iron) + plastic [Color]: Brown [Weight]: 58.58g [Size]: 12mm x 120mm [size]: Overall length: 195mm Expansion tube length: 75 mm, diameter: 12 mm Support rod length: 120 mm, diameter: 12 mm [Package]: 6 x Hidden Floating Shelf Brackets can support and fix all kinds of wall shelves, such as bookshelves, display shelves, garage shelves, decorative shelves, bathroom shelves, shoe racks, etc. It can definitely satisfy your various designs of DIY wall mounts. Installation steps: 1. First measure the hole spacing and drill the hole in the wall. The depth of the hole should not exceed 75mm. 2.Insert the extension end of the mount's retaining pin with the black screw cap on the end into the hole in the wall. 3. Insert the support rod into the dowel of the wall hole. Once the end of the screw is properly in contact with the screw cap and tightened clockwise, continue turning untilThe expansion anchor in the wall expands to fully support the wall. 4. Then drill the appropriate size hole on the side of the plank (according to the hole spacing of the wall). 5. Finally, insert the circuit board into the circuit board support rods. Note: 1. You need to prepare a 12mm drill bit to drill holes. 2. Remember to place the middle silver metal ring on one side of the expansion tube and embed it in the wall. 3. Each painting must have at least 2 invisible supports and be held in the same horizontal position.