Needed some hooks for my Ivar shelves to hang things and came up with this. It's a tight fit because I wanted the hook to stay on under its own friction.

Printer Settings for Good Quality:

• Used PLA+ from Sunlu.
• No supports.
• I used brim to prevent my corners lifting.
• Layer height: 0.12
• Perimeters: 3
• Infil: 25%
• Infil Pattern: Cubic.

If you dont care about the look of the hook, here are some settings I used for prototyping:

• Used PLA+ from Sunlu.
• No supports.
• I used brim to prevent my corners lifting.
• Layer height: 0.32
• Perimeters: 2
• Infil: 15%
• Infil Pattern: Lines.