Imperial Scribe
thingiverse
This should work as a pencil scribe. Slide a wooden pencil through the hole, and accurately (or as accurate as your printer is calibrated) draw lines at 1/4", 3/8", 1/2", 5/8", 3/4", 7/8" and 1", depending on the face used. This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/4vccZhzQutd
Download Model from thingiverse
With this file you will be able to print Imperial Scribe with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Imperial Scribe.