Bolt Pen!
thingiverse
Take a pen and embed it snugly inside a 3/8 inch bolt. Make sure the cap securely fastens with a simple screw. Extract an ink cartridge from an affordable Bic or Paper Mate pen for this job. To prevent the pen from shifting, apply a tiny amount of hot glue if necessary.
Download Model from thingiverse
With this file you will be able to print Bolt Pen! 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 Bolt Pen!.