Once you have these hidden shelf hardware, you don't have to worry about ugly metal accessories damaging your home decor. It will create an illusion of a floating shelf. Hang any shelves you want as you please.Made of metal, rust proof and non bending, ensuring quality and service life in humid weather.A space saving storage space that keeps your home organized and enhances space flexibility. Widely used as a background wall in homes, kitchens, garages, offices, cafes, restaurants, shops, and more.The opening diameter is 10mm and the depth is 125mm. There is an error of 1mm, please drill according to the actual situation. Note: Not applicable to boards with a length less than 140mm (width of two supports), a width less than 130mm, and a height less than 15mm.Product dimensions: 130mm * 70mm * 15mm (length * width * height), thickness: 4mm, distance between two mounting holes: 42mm. Packaging content: 4x bracket, 8x contrete anchor bolt, 8x gypsum board anchor bolt, and 8x screw.