PERFECT FIT: This J shelf brackets fit the nominal 1”x 8” and 2” x 8” (actual 7.25”) lumber board from Depot Home, measure 7.25” x 4” x 1.5”(broad is not included) HIGH QUALITY ...

You can choose to make your floating shelf with metal ... need to pick floating shelf brackets that combine durability, strength, and concealment to provide support and prevent sagging.