Description:Rod Size: 400 x 19 x 19mm / 15.75" x 0.75" x 0.75"(L*W*H); Fixing Plate Size: 81 x 45 x 3mm / 3.19" x 1.77" x 0.12"(L*W*T); Hole Distance: 63mm / 2.48", 26.5mm / 1.04", 350mm / 13.78"; Hole Diameter: 6mm / 0.24", 4.5mm / 0.18"; Package Content: 2pcs x Shelf Brackets, 8pcs x 60mm Screws, 4pcs x 30mm Screws, 8pcs x Expansion TubesMaterial: Metal material, integrated welding process, stronger load bearing, spray treatment, prevent scratch, moisture, corrosion and rust.Advantage: The clever design creates the floating that your shelves are vision and enhances the flexibility of the space. Create maximum available storage space.Installation: Simply drill a hole in the wall, tighten the screws to mount the floating shelf bracket to the wall, and secure your board with short screws.