The Tombow ABT Dual Brush Pen has a fine tip perfect for consistent lines and tight drawings, complemented by a highly flexible brush tip which is soft yet durable. Tombow ABT's are water-based and so odourless, non-bleed, non-toxic and acid free. They work like watercolour paints and blend effortlessly. These pens are widely used for rubber-stamping, card-making and as artists' watercolour pens. The Dual Brush Pen is also used by comic book designers and graphic artists.