American customer video - How to open the slit on the tip of a luxury pen

Metal and metallographic cutting wheel
July 19, 2025
The video sent back by the American customer - "The pen tip rotates at 18,000 revolutions per minute, with a whirlwind opening mechanism"... .. #AUTOFOR# 0.12mm World Record # Ultra-thin Cutting Wheel # Meshless Cutting Wheel # Ultra-thin Resin Cutting Wheel