Ruler Marker
thingiverse
Clamps onto a ruler to mark a measurement. Can also be used for finding 90 degree angles.
Download Model from thingiverse
With this file you will be able to print Ruler Marker 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 Ruler Marker.