Product Description: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Height adjustable via slots against wall, angle adjustment via supporting pin which presses on the rear plate when turned in.4.Good shelves that appear to float on the wall - beautifully modern visual display or storage.5.Fits for 20-30mm shelf thickness, can be directly inlaid into wood board or masonty.6.Used for the concealed mounting of shelves(invisible support). Specifications:Material: Cold Rolled SteelColor: Silver Size: 6.91x1.39x10.3cm/2.72x0.54x4.06inch(LxWxH)Screw Holes: 6mm/0.23inchScrew Hole Distance: 44.5mm/1.75inchWeight: 852g Package include:8 x Floating Shelf Support Brackets16 x Screws