Antrader Set Of 4 Floating Shelf Brackets, 4-Inch(Deep) Concealed Blind Shelf STEP 1 : Place your first hidden bracket against the wall, using a spirit level to make sure it's level. Mark the fixing-hole positions with a pencil. Package Content: 4Pcs 4-Inch Floating Shelf Brackets, 8Pcs Strong Screws, 8Pcs Wall Plug Made of Cold Rolled Steel matte black powder coated design, widely used in home and office areas. Ingenious design creates the illusion that your shelf is floating, enhance the flexibility of space. Heavy duty welded construction so won?t bend or break - solid steel supports up to 50 lb. Quick and easy installation, just simply drill a hole in the shelf to fit the diameter of the rod and screw into the wall