Heavy-duty, quick-dry, truly permanent ink marker which is xylene-free. Valve-action marker features a fiber tip and an industrial strength ink ideal for permanent identification of parts or accessories. The clear, crisp marks resist fading even when subjected to varying, extreme climates. Won't rub off slick surfaces like plastics and shrink wrap. Permanent ink writes on smooth surfaces such as metal, aluminum, steel, plastics and more. Marks withstand dirt, oil, grease, extreme weather conditions and even degreasing solvents. Interchangeable and replaceable tips available. Threaded end that can be screwed into a jig or apparatus for a continuous identification application. Drying Time: 15 to 20 seconds.