Itoya Nikko Permanent Pens

These fine-point pens write on virtually any surface, including film, metal, plastic, glass, wood, and cellophane. Each pen contains a generous supply of quick-drying, permanent, waterproof ink that won't wash or rub off.

The tips are fitted into long metal sleeves to allow drawing close alongside templates and rulers. They're perfect for detail work, since the hard plastic porous tips won't fray, and every line is precise.