This is designed to print around a 12x3mm round magnet. I had a bunch of them stuck to my fridge and they were annoying to remove/replace. I designed this little handle to print around them to make it much easier. Just pause the print after the hole for the magnet is printed and place the magnet inside before resuming the print.
I found a tutorial on how to add a pause via the Orca slicer here if it helps: https://youtu.be/PCVd2_qj1pQ?si=0MB3SwrTGvTOcEVF
The author marked this model as their own original creation.