Monocle and Chain
thingiverse
This text is for using a monocle properly. Check it out: http://www.smbc-comics.com/index.php?db=comics&id=2255#comic. Be cautious while employing it, though. The chain attaches at specific points and you can print just the chain section too. Some adjustments might be required post-printing.
Download Model from thingiverse
With this file you will be able to print Monocle and Chain 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 Monocle and Chain.