Solid Steel ROD These support brackets are designed and built to support up to 150lb weight. The rods in the brackets are welded with Proper care so that it will not separate from the plate.	Dimensions This Heavy Duty hidden floating shelf Brackets measures 31.3” (L) X 6.25” (W) X 1.5” (H), Rod diameter 3/4"It weighs 5 lbs (approx.)	Easy Installation Our 32-inch floating shelf bracket is made with a 0.16” Thick steel backplate and 3/4" solid steel support rods. it’s too easy to install after mapping your wall stud, screw it into the pre-drilled holes and your beautiful storage shelf bracket is ready to use.