Heavy duty shelf brackets for 8" deep shelves.

 x2 plates with a left and a right bracket.

 Recommended 4 perimeters and 25% infill, Polymaker PolyLite PLA Pro, or PETG. 

 The screw holes are designed for #9 x 3" screws. I personally used 3.5 or 4 diameter head screws and is nearly flush fit.

 PLA Pro allows the screws to snug TIGHTLY against the wall without cracking or damaging the brackets.

 This is a remix, and the credits for the design and all work goes to Loyal Moses.