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
IRWIN Strait-Line chalk is made from a proprietary formulation for the highest performance results. Together with the IRWIN chalk reels they leave darker, sharper lines.
