All new Sharpie PRO permanent markers that write on just about anything, including wet, dirty and oily surfaces. Available in 3 tips : Fine, Chisel and XL Chisel. Sharpie Pro Markers are great for commercial and industrial users and are a must-have for the tool bag. The Ink is specially formulated to mark on wet, oily, dusty, and abrasive surfaces. They have an Anti-roll barrel shape so they won't roll away, the clip is 'Break-resistant', they have a 'Ribbed' grip area for comfortable use and a Lanyard loop for quick access.