Our 4-piece INKZALL™ Black Fine Point Jobsite Marker Set features clog-resistant tips and gives you the ability to write on dusty, wet, or oily surfaces. The durable permanent marker tips are designed for writing on rough surfaces such as OSB, cinderblock, and concrete, and the ink dries quickly to reduce smearing. The construction marker also has a built-in hard hat clip providing you with easy storage and access. You can leave the marker cap off for up to 72 hours and the fine tip will remain completely functional. Our MILWAUKEE® INKZALL™ markers showcase our relentless mission to provide you with innovative solutions and commitment to best-in-class durability.