The Dykem TUFF GUY is a heavy-duty, truly permanent ink marker which features a non-xylene based formula. This valve-action marker is ideal for permanent identification of parts or accessories. The clear, crisp marks resist fading even when subjected to varying, extreme climates. TUFF GUY won't rub off slick surfaces like plastics and shrink wrap.General-purpose pigmented ink marker that writes on almost any surfaceHighly resistant to most coolants and cutting fluids degreasing bath and other industrial chemicalsMakes permanent bright marks on rubber, plastic, metal, glass, corrugated board, leather, stone, wood, vinyl and moreMarks withstand dirt, oil, grease, extreme weather conditions and even degreasing solventsQuick drying, pigmented ink withstands indoor and outdoor conditionsMarkers can be used to permanently identify inventory, assemblies, tools, finished products or work in progress while resisting most work related abuses or compoundsValve actuated mechanism prevents paint in barrel from drying when cap is left offMarker has a heavy-duty aluminum body with large paint capacityMarker features a threaded barrel that can be screwed into a jig or fixture for a continuous marking process