The Tombow Dual Brush Pen Set is an excellent choice for artists and crafters. They have a unique design that features a different tip on each end. The flexible nylon fiber brush works like an actual paintbrush to make medium or bold strokes by simply changing the amount of pressure. The fine tip makes consistent lines and tight drawings. Both are soft yet resilient, which helps them retain their point, stroke after stroke. They are also self-cleaning after blending for a mess-free experience. This art pen set uses a single ink reservoir to ensure an exact color match. Water-based it is blendable, odorless, non-toxic, acid-free and non-bleeding for high-quality image results. This versatile colored pen set is ideal for rubberstamping, hand lettering, fine art, illustrations, graphics, doodling, journaling and more.