A unique high performance marker that produces crisp, sharp lines for freehand drawing or for use with a straightedge. The dense “India Ink -quality” black ink will not bleed through most papers and is perfect for technical drawing, sketching, fine art, lettering and illustration – any project that demands high quality results. Favored by cartoonists worldwide. The durable plastic fiber nib will not clog. Available individually in three line widths (0.3mm, 0.5mm, 0.7mm) or as a set of three, Penstix now include a convenient pocket clip and a ribbed cap that fits snugly on the barrel. Markers and sets are sold individually.