Floating Shelf Brackets
Floating Shelf Brackets are made here in the USA by Right On Bracket. First of all They are brushed and powder coated to be safe to the touch yet durable for all conditions. Also The hidden shelving brackets are made to mount on the support beam in the wall and covered with sheet rock or wood paneling. The hidden shelves are 8.5″ from the wall to the edge. Use 6 screws to mount to the stud.
The fireplace hearth brackets are mounted on the mounting stud above the fireplace itself. Therefore depending on the weight and design of the fireplace and hearth the amount of brackets needed could vary.
Likewise the floating brackets need to be installed behind the drywall. On the support beam of the wall to give the stability it needs to support just about whatever you need. Mount 6 screws into the side of the beam and you are good to go.