Permanent marker is designed to work on almost any surface - indoors and outdoors - including cardboard metal and plastic. resists rubbing water and fading to deliver marks that last. The is low-odor nontoxic and certified. Quick-drying formula minimizes accidental contact with damp . A chisel tip allows you to vary the width of your strokes for legible notes on small surfaces and broad strokes on high-visibility signs. Nontoxic formula allows safe use by children. Avery Marks-A-Lot Desk-Style Permanent Markers 12 / Dozen (Quantity)