The Metacil Pencil from Sun-star is fully made of aluminum, and the pen tip is made of a special alloy material containing graphite.
The octagon body is easy to hold. It can continue to write for a distance of about 16 KM without sharpening and erase your handwriting with an ordinary eraser and ideal for drafting.
Since it will not bleed through water or water-based markers, it is suitable for watercolour painting and illustration drawing.