1.Rubber protect finger 2.Special wire clip pen ... service offered ,buyer label offered This metal pen has rubber to protect finger ,and a speciall clip made ... MM / 1.0 MM (blue/black) and so on all sorts of colors.3. Metal pen material: brass, aluminum, steel, ... so on.5. Pen surface treatment: spray paint, ordinary rubber paint, common electroplating, environmental protection electroplating, etc.6. Pen ...