Ideal for Sketching, Mapping, Cartooning, Engraving, Extra Fine Writing and Drawing, Mapping. Mapping nibs are Only for Use with a Mapping Holder, Ideal for Both Professional and Amateur Use. Nib points have a protective lacquer to prevent tarnishing. Briefly immerse the full pen point in boiling water before first use to remove thi lacquer. Set includes pen holder, 6 nibs 2 x 659, 850 and 2788. Blister pack