I needed a shelf support for the wire shelves we put in our pantry. Because the pantry has an angle in the back, the wires aren't really supported and are prone to bending and food falls through. Just a simple support L-bracket (see pictures).

I designed the screw holes to accommodate Blue Hawk #0326618 20lb wall anchors, which uses a #6 x 1" screw. 

I only used 15% infill with PLA, as I did not intend to put anything too heavy on this shelf.