This adapter allows the installation of 17mm hex wheels onto 12mm hex spindles.
The uploaded STL files are designed specifically for those wheels https://aliexpress.com/item/1005005155368361.html.
You can use the provided SCAD files to modify the dimensions and export STLs customized for your wheels, or you can scale it in the slicer.
You will also require an M5 DIN 9021 washer with an outer diameter of 15mm.
The author marked this model as their own original creation.