This is a three-color ballpoint pen that uses "friction ink" that can erase handwriting with frictional heat.
The ultra-fine body has a maximum diameter of 12.8 mm, and the tip shape is smooth so that it can easily fit into a bag, suit, or notebook pen holder, improving portability.
The clip uses a lift clip that will not break even if it is clamped 100,000 times. Handwriting can be erased smoothly by rubbing with the erasing rubber at the back of the pen.
This is a 0.38 mm ultra-fine type that is ideal for those who prefer fine writing or writing in small areas.