This is a Test Cube with several Features to test the Capabilities of your Printer and Filament.
Knowing the restrictions of your Printer and Filament will help you design your Things.

Features which are tested:

• Overhangs between 45° and 85° in 5° steps
• X, Y, accuracy (20mm + 10mm)
• Z accuracy (20mm)
• Hole accuracy 5, 4, 3, 2mm X-Y-Plane
• Hole accuracy 6mm X-Z-Plane
• bridging 15mm
• bed adhesion for thin features
• overall Print-quality
• etc.