The Tombow ABT Dual Brush Pen features a fine tip for precise lines and a flexible brush tip that offers varying thickness based on pressure. These water-based pens are odorless, non-toxic, and acid-free, behaving like watercolor paints for effortless blending. They are ideal for rubber-stamping, card-making, watercolor art, comic book design, and graphic art. The pens offer unlimited creativity for hand lettering, watercolor illustrations, bullet journaling, stamping, and drawing manga and mandalas. The colors are mixable, allowing for beautiful color gradients using a watercolor technique. Tombow, a Japanese family business, is known for high-quality and reliable writing instruments that support creative endeavors.