Drill Guide

A 90° Drill Guide with a Picture Frame Screw Hole at the bottom to hang it up and the possibility of embedding two 8x3mm Magnets ( requires a Pause Command to be inserted at the appropriate Layer Height )

Press Drill Guide Bottom against Wall ( or Object ) and Drill along Drill Guide Corner while keeping Drill Parallel against both Inner Surfaces of the Drill Guide.

Print at either 0.2 or 0.3mm Layer Height ( because of the position of the Magnets ).

HQ Render Image shows the Cross-Section View with the position of the Screw and Magnets.