Milwaukee Inkzall marker

Stays sharp, doesn't mushroom or push back under pressure.Acrylic nib ideal for rough surfaces such as OSB and concrete.Marker continues to write after 72+ hours of cap off time.For use on concrete, wood, metal, plywood, OSB, plastic.Can be used on wet, oily, dusty, rusty, with debris surfaces.Quick dry time – reduced smearing markings on PVC, metal surfaces.Thin body for use in restricted areas.Helmet clip – can be clipped to the construction site cap, trousers, overalls.Easy open cap for one hand operation.Anti-Roll design - won't roll off surfaces.