A 3D printed rotary tool holder for drilling small diameter holes.
The tool in action: https://youtu.be/3XB6wuhnnF0
More information at: https://daumemo.com/diy-3d-printed-desk-drill-press-for-a-rotary-tool-dremel-or-others/
Haven't tested with an actual Dremel, but with only one similar rotary tool (made by Skill)
The bottom is made from two separate parts: BottomPlateTop.stl and BottomPlateBottom.stl - these two are glued together.
2 pcs of SlidingFrame.stl need to be printed. Those two are also glued together (as it can be seen in photos).