widely used in home and office areas. Easy installation. Concealed mount, Floating shelves (invisible supports). Angle adjustment via supporting pin which presses on the rear plate. You will need some screws to fix the support bracket, but here screws are not Made to last a lifetime, we recommend mounting to a stud on your wall for maximum support. Each bracket holds 15lbs. For heavier shelves please add extra brackets to distribute the weight. colour: Silver Material: metal size: 10*102mm Package Contents: 4* Metal Hidden Concealed Invisible Shelf Support Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.