just a simple compass that is held by a bolt that is 3d printable and it can be used with most of standard pens/pencils and i recommend you should use 100% infill because it might be fragile at spots if the infill is low and because the compass is pretty small, it has a point end and it should be printable with little to none support

Anycubic

i3 Mega X

Doesn't Matter

No

high

100