Makes permanent bright marks on metal, rubber, plastic, glass, concrete, leather, stone, wood, vinyl and more. Valve action mechanism prevents paint in barrel from drying when cap is left off. Contains a large capacity of paint in a heavy duty aluminum barrel. Heavy duty barrel retains its shape. Ideal for color coding. Bullet tips are replaceable to assure complete use of paint in each marker. Threaded end can be screwed into a jig or apparatus for continuous identification application. Pen cap clip fits on pocket or clipboard. Drying Time: 25 - 35 seconds.