With permanent ink designed to mark on wet & oily surfaces, Sharpie PRO Permanent Markers are built jobsite-tough. These permanent markers with an extra-large chisel tip better fit the needs of tradesmen with features like an anti-roll barrel shape, cap clip, lanyard loop & more. They mark on wet & oily surfaces, including metal, wood, PVC & concrete. Versatile tip makes broad, medium & fine strokes.