This Marker performs the following functions : • Marks on almost any surface- dry or wet, dusty, rusty, or rough • No dripping or mess- mark upside down, sideways, at any angle • Quick-drying formula, usually dries within 5 to 7 minutes • Permanent when dry, water-proof & fade-resistant • Wide temperature range includes cold temperature environments • Use indoors or outdoors, even when raining or snowing • Fits in a pocket, or in certain loops of some tool belts • Push up from bottom end to advance marker material, using a rod, stick, pencil, • or tool like a screwdriver • No hazardous material labelling or handling needed