With permanent ink designed to mark on wet and oily surfaces, Sharpie PRO Fine Tip Permanent Markers are built jobsite-tough. The newly redesigned permanent markers better fit the needs of tradesmen with features like an anti-roll barrel shape, cap clip, lanyard loop, and more. These professional markers will get the job done. Permanent ink that can mark on wet, oil, dusty, and abrasive surfaces Durable tip stands up to wear and tear Fine point Anti-roll barrel shape Rugged grip area for better control Fine point lets you create precise lines.