Floating Shelf Hardware
A pair of these Canadian made, zinc-plated steel blind shelf supports will invisibly hold a floating shelf or mantle with a minimum thickness of 1". Based on a pair, they can hold 50lbs of weight at 8” deep. Please note that these ratings are based on evenly distributed weight.
You simply fasten the mounting plate to the wall studs with two flat-head screws and slip the 5” long hex posts into 7/16" holes on the back of the shelf/ mantle. The design of the hex post allows the corners to cut their way into the wood in case your holes end up slightly smaller.
Each package comes with instructions.