Shelf Bracket

These brackets are 20cm long and 10cm high. I am using them on my plywood shelves that are 30cm deep. They are mounted to the wall with two wood screws 3-4mm wide, and to the shelf with two 20mm m3 bolts and a pair of m3 nuts. The bracket was printed with a 0.8mm E3D Hardened Steel nozzle with ColorFabb's WoodFill Fine filament.