Milwaukee INKZALL Black Fine Tip Jobsite Marker (Pack of 36)The MILWAUKEE INKZALL Jobsite Marker features clog resistant tips and the ability to write through dusty, wet or oily surfaces. The durable marker tips are designed for writing on rough surfaces such as OSB, cinder block, concrete, and the ink dries quickly to reduce smearing markings, without drying out quickly when the cap is left off. The INKZALL fine point markers have a built in hard hat clip for easy storage and access. UPC: 045242319473