IRWIN Strait-Line Red Chalk

Permanent marking chalk produces weather-resistant lines that remain visible after weeks of weather and jobsite wear and tear. Engineered flip-top cap that keeps the chalk in the bottle where you want it and stops it from spilling out in areas that you don't want it. For use on a variety of surfaces including wood and drywall. Chalk containers are filled by weight, not volume. Made to fit all standard doors for installation. Total lifetime guarantee on parts and finish.