From commercial to home use, this Craft Smart paint pen can be used on a host of non-paper surfaces. Label metal containers in the pantry with this pen to keep things organized. These pens are perfect for multi-surface use on plastic, glass, metal, porcelain, stone, wood and moreDetails: Available in multiple colors Extra fine tip Oil basedPermanent and quick dryingMulti-surface useConforms to ASTM D-4236