L - Bracket with mounting holes access
thingiverse
Simple 6'' x 6'' bracket for a small shelf or something along that line. The diagonal bar has holes to access the internal mounting points with a long-ish screw driver. I included the .rsdoc file, in case you want to adapt the bracket to your specific needs. I use two of this (printed in PETG) to hold a 6''x12''x0.75'' poplar board attached to drywall. On top of it i keep 3 spools of filament (~6.5 lbs), and everything feels sturdy.
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