The fineliner tip on the other end is for smooth straight lines or writing.When accuracy, minute details and preservation count, the unparalleled archival quality of Felt Tip pens make them everyone's first choice. Artist, writers and illustrators reach for pigma micron and know their work is safeguarded with the permanence of pigma ink felt tip marker. Experience smooth, skip free writing and crisp ink colors that leave consistent lettering and lines every time. It has achieved universal appeal and is carried by technical professionals, artists and crafters alike anthropologists, entomologists, scientists, research laboratories, archivists, architects, professional diamond cutters, cartoonists, manga and anime artists, illustrators, heirloom quilters and decorative fabric artists. Features archival quality ink for use in acid free environments, chemically stable, waterproof, fade resistant, no smears, feathers or bleedthrough on most papers. Applicable for graphic art, scrapbook, archival recording, pen and ink illustrations, freehand art, rubber stamps, cartooning and fabric design. Technical qualities are archival quality pigma ink, six point sizes, no smear or feather when dry, waterproof and chemical proof, fade resistant, does not bleed through most papers, meets astm and acmi nontoxicity standard and not evaluated for cosmetic use on skin. Double-ended tips with bold and fine point for your marking needs. Can be used to write metal, glass, wood products, clothes, CD discs and so on. The marker pens set as a sign pen can be stater for many days, school and office will need this kind of bullet journal pens for students,teacher and leaders.