Vivid 24 Color Fine Line Pen Set, 0.4mm Fine Pen Tip Is Suitable for Writing and Drawing Without Penetrating Paper. This Fine Line Pen Adopts Durable Metal Pen Tip, Which Can Prevent the Pen Tip from Swinging or Breaking. It Is Very Suitable for Coloring. It Is Suitable for Diary, Planning Book, Calendar, Agenda, Notes, Painting, Writing, Coloring, Sketch, Marking, Signature, Cartoon, Design, Illustration and Children Graffiti, Scrapbook Notes, Coloring Small Complex Patterns, Diy Photo Album Diary, Etc.