These fine line drawing pens can add the precision and line details as required to your artwork. The tips are available in a variety of thicknesses. High-tech nib assures smooth action and even ink flow. Metal nib collar adds strength and allows use with straight edges, templates and other tools. Set includes 4 black ink nano fine liners with nib sizes 0.1, 0.2, 0.3, and 0.5mm.