ZYLtech 1.75mm 3D Pen

I use this 3D pen as a pla welder for my 3D prints it's better than using super glue or other epoxies to stick my prints together and a lot faster and less messier it heats up quick and it's a very easy to use it's perfect for fusing two prints together

Was amazed that this one works so well and is simple. Only issue so far that I see is when you print then use reverse to change filament, the end of the filament can leave small or stringy parts. This causes it to jam and it jams at the entry point, so you can't push filament in to force it thru. I only was able to save it by using a dental tool to dig out the filament.
I also worry that the tip cannot be swapped, so you are screwed if it clogs. A simple improvement would be to just use standard brass screw in 3d printer nozzles. Then, add 3 screws on the body to make it so you can easily open and see the filament path and take out strings or small chunks of filament.

Great price, good device. does what I need.

Works perfect, highly recommended