Came across this by accident
folks and wanted to share this Bracket with anyone interested. I only found them at HOME DEPOT, must be ordered from a special order desk. You buy two in a box and mount wood
or metal on top, for a PC table, nightstand, dinner table or small chart table. It's cool because you can fold it down out of the way after use. Two Brackets come in a box 16" and 12" inch and folds down 45 & 90-degree. Makes for a nice heavy-duty Shelf. Here is the link. NOT FOUND IN STORE YOU HAVE TO SPECIAL ORDER AT HOME DEPOT
(About $20.00-USD view link).
Let me know if this worked for you. I have never fold one so good and had to always use a fixed shelf. This if very heavy-Duty Bracket so I hope it works for you as well as it did for us.