This set includes 20 open shelf brackets, each measuring 12" L x 8" H, designed to fit lumber boards that are 12 inches deep or more.You can pair these L-shaped shelf brackets with various types of boards to create custom wall shelves for your workshop, kitchen, garage, or laundry room, giving your shelving system an industrial farmhouse rustic look.With 20 shelf brackets in the pack, you can add more brackets as needed to easily support greater weight. These heavy-duty metal shelf brackets hold up to 60 lbs per pair (2 pieces).The floating shelf bracket set comes with screws for both wall and board mounting, allowing you to quickly and easily install these brackets for wood shelves.