A multi-functional geometric drawing template for helping draw circles and angles, and can also be using as a ruler for metric measurement.  The center circle rotates, and has different spots for drawing straight lines at a desired angle (the provided tick marks are at 5 degree increments).   Or place the tip of a pencil in one of the spots provided to trace a perfect circle at different diameters.  Four smaller diameter labeled circle templates are also provided around the outside, as well two standard shaped triangles.

This model was designed to be print-in-place with a .4 mm nozzle and .2 mm layer height, and a filament change can be used to print the tick marks on the top in a different color for the last two layers.