Hidden mounting brackets- Can be used for DIY or custom ledges, completely hidden in walls and boards, simple and fashionable, to make your home more beautiful and tidy.Material- L inside of the floating shelf bracket is made of iron, its casing and expansion tube are made of plastic. It is fine workmanship, sturdy and durable.Dimensions- The total length is 195mm, the length of the expansion tube is 75mm, the diameter is 12mm, and the length of the rod is support is 120mm, diameter is 12mm.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 shelf bracket is very strong. If properly installed on a suitable fixed brick wall, the bracket can support approximately 20 kg.