Milwaukee INKZALL™ Black Fine Point Job Site Markers, 2-Pack are specially designed to perform on the roughest surfaces you encounter on the jobsite, including OSB, cinder block, and concrete. These markers feature clog-resistant tips that ensure smooth and reliable writing even in challenging conditions. They can write through dusty, wet, or oily surfaces with ease, and the fast-drying ink minimizes smudging while resisting drying out when the cap is left off. For added convenience, each marker includes built-in hard hat clips and a lanyard hole, making them easy to carry and access whe you need them. Model Number: 48-22-3105