ESCO 0.5mm mechanical pencil (black/gel grip)

Equipped with a shakashaka mechanism that shakes and the core comes out
With a core lock mechanism that prevents the core from coming out when not in use (If you knock the knock cover strongly, the core lock will turn on and the core will not come out even if you touch it. If you knock again strongly, the core lock will turn off and shake. And the core will come out.)