Amazon.com: 2Pcs Heavy Duty Steel Mantel Brackets, 7 x 6 x 2½ inches Metal Shelf Bracket Support for Fireplace, Wall Mounted Floating Triangle Holder, Hand Welded Countertop Bracket Load 330 lb, 5.9
Amazon.com: Floating Mantel Bracket-Sheppard Brackets-Studlock System-Heavy Duty Floating Mantel Bracket (9 in. rods, 58 in. Backplate) : Tools & Home Improvement
Amazon.com: Heavy Duty Mantel Brackets U-Shaped - Thickness 1/4" Floating Shelf Fireplace Bracket, Beam Style Mantel Support Max Load 440lb(200kg)Size: 6" x 6" x 5" : Industrial & Scientific