Clog resistant marker tip;Durable marker tip for writing on concrete, OSB, and rough surfaces;Writes on dusty, wet, and oily surfaces;Built-in hard hat storage clip;Lanyard hole;Ink dries in seconds;Anti-roll body design;Non-toxic ink;Clog Resistant Marker Tip;Fine Point;Tether Ready Lanyard Hole;Writes through Dusty, Wet and Oily Surfaces