Silent pressing structure, no worry to use even in quiet places such as library and gallery.
When the nib is pushed out, the clip sinks into the pen barrel and cannot be clamped on any object and keep stable.
Triangle barrel which is ergonomic. Dual-injection technics makes it comfortable to hold.
0.5mm Twin-ball spring nib reduces the friction with paper so as to make writing much smoother.
No smear and Fast drying ink