The Milwaukee INKZALL Extra Large Chisel Tip Jobsite Markers are optimized for job site conditions. The extra large chisel tip writes bigger and bolder for clear visibility. The construction marker's durable tip can write on dusty, wet or oily surfaces. It is clog resistant, providing clean, continuous marking. Quick Dry ink reduces smearing after use. The permanent marker can be left without a cap on for up to 72 hours and remain completely functional. INKZALL markers showcase Milwaukee's mission to provide innovative solutions and commitment to best-in-class durability.