Ball Point Paint Marker.
Easily makes sharply defined bright marks on any type of metal surface.
Withstands oil, grease, and rubbing without losing legibility or brightness.
Precision stainless steel ball mechanics.
Rugged aluminum body.
Rubber bulb flow control.
Mark cold / oily surfaces.
Can be used to permanently mark glass, concrete, lumber, plywood, plastic pipes, plastic laminates, concrete and paper products.