Heavy-duty desk support bracket

I needed a heavy duty bracket for the installation of a 10' (solid-wood and heavy) desk top in my home office. The kind of desk that is attached to three walls and goes with under-desk drawer cabinets. Printed in PLA, there are two types of the bracket, one for support only and the other can be fixed to the bottom surface of the desk also to prevent it from moving away from the wall. The brackets are supposed to be screwed into wall studs and comes with two holes for #8 construction screws. 1/8 Inch or up to M4 screws will fit through the hole on the underside of the desk.