Completely hide behind your shelving, small profile for easy concealing. These shelf brackets are widely used on backdrop wall in home, office, cafe, restuarant, store and more. You could DIY your wall, mount the wall shelf to offer a large space to storage or decorate in living room, bedroom, study, corridor, balcony. Installation: 1. You should use level to mark cross on the wall to make sure you drill the holes in the right place, the distance between both holes is 42mm. 2. Drill two holes into the marks on the wall and make sure the hole can fit the screws you mounted. 3. Screw the shelf bracket into the wall by two screws. 4. Drilling holes in the side of the shelf, make sure bracket rod fit into the holes. 5. Just simply mount the shelf to bracket rod, level it and hold it securely into place. (For a flush mount, please use a chisel or Router to make a channel about 0.16 inch deep to hide the mounting bracket) colour: Silver Material: metal size: Total Length: 76mm/ 3 inch Bracket Base Size (L x W x T): 70 x 14.5 x 4mm Bracket Rod Diameter: 10mm Mount Hole Size (L x W): 12 x 6mm Mount Hole Distance: 42mm Package Contents: 18 x Invisible Shelf Brackets