Milwaukee® 4-Pack Fine Point Colored Markers write on a wide range of surfaces, both in wet and dry environments. They rely on ASTM D 4236 certified ink and heavy duty acrylic nibs for ongoing performance. The package includes four permanent markers, each with a different color. Use them on everything from concrete to steel, and carry them with you from one task to the next. We recommend these Milwaukee markers for those that need a versatile solution to job site notations. Their hard hat clips make them easy to transport, and they include lanyard holes for those who work without hard hats. Each pen's ink dries quickly, so users may mark their surfaces without smearing or running. Trust these heavy duty writing utensils for every material you encounter on the job.