Thornton's Art Supply Distinct Fine Line Sketch Drawing Pens, Black Ink, Assorted Sizes, Pack of 8 Fine point pen ideal for drawing and writing. Nib sizes for precise line width are 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 and 0.8 respectively Thornton's Art Supply Premium Fine Liners are the perfect marker for precision line work. Best used for fine art, drafting, design, comics, sketching and crafting. Comes with a wide variety of point size. Write really BOLD or extra fine at the switch of a marker.