This construction marker is built for demanding jobsite conditions. Its anti-clog tip delivers clear, smooth writing, while the durable permanent nib glides reliably over rough surfaces such as brick, and concrete. The quick-drying ink prevents smudging and remains usable even after being left uncapped for up to 72 hours. With its dual-color design for instant switching, it’s ideal for inspections and markings across multiple tasks, greatly enhancing work efficiency.