Floating Shelf Support Brackets in a stud mount format allow for a thinner profile floating shelf. Federal Brace Stud Mounted Shelf Brackets come in two lengths for varying depths of floating shelves. The 0.875" bracket arm has a flat mounting plate that is 2"x2" or 2"x4" and attaches to the side of the stud. Installation should be every 16" for the length of your shelf. Each bracket will have a carrying capacity of 100 pounds. The shelf must not be more than 2" deeper than the end of the bracket to avoid seeing deflection.