CoLiDo 3D Printing Pen works by heating softly plastic filament just like all FDM 3D printers. Once soft melted filament leaves the tip, it solidified just a few seconds. Then you can doodle any shape you want, absolutely portable and easy to use. The 3D Printing Pen is also available for decoration. When together with CoLiDo’s strengths in 3D printer pen and filament, you’ll achieve more than what’s expected! By the way, CoLiDo 3D Printing Pens could be helpful and useful in modifying and repairing 3D prints at any minute.