The mounting holes of the part cooling fan for Průša i3 printers are quite wide, something about 4.3mm. If the mounting screw gets too much torque, it damages the hole and sinks inside.
These inlays prevents this.
Printer Brand: Prusa
Printer: i3 MK2.5
Rafts: No
Supports: No
Resolution: 0.2mm
Infill: not needed
The author marked this model as their own original creation. Imported from Thingiverse.