The MILWAUKEE 12-piece INKZALL Black Fine Point Jobsite Marker Set features clog resistant tips and provides users with 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 users with easy storage and access. Users can leave the marker cap off for up to 72 hours and the fine tip will remain completely functional. INKZALL markers showcase Milwaukee's relentless mission to provide tradespeople with innovative solutions and commitment to best-in-class durability.