A 3D printing pen (or 3D pen) resembles a handheld 3D printer. It comprises a heating component and an extruder. The 3D pen utilizes PLA (Poly Lactic Acid), ABS (Acrylonitrile Butadiene Styrene) or PCL (Polycaprolactone) kinds of plastic which is the similar material as put in several 3D printers.But unlike the desktop 3D printers where the computer software and motors control the nozzle flow, the working of the 3D pen is managed by our hands. Most significantly, utilizing the 3D printing pen is similar to using an ordinary pen or a pencil, you hold it the same way you hold those, and start using it. You can use it to create multiple things and there are several ways you can use the pen with the 3D pen printers.