The OX Pro 1.1kg/2.5-lbs Hi-Permanence Crimson Red Marking Chalk is designed for exceptional durability and performance in the toughest outdoor conditions. With its large 1.1kg/2.5-lbs supply, this marking chalk ensures that you have ample supply for extensive projects, making it ideal for use with chalk lines and chalk reels.

This high-performance chalk features a high-flow nozzle for smooth, consistent application and a leak-proof quarter-turn twist cap that keeps the chalk sealed in an airtight chamber. This design prevents spills and clumping, allowing for easy and efficient refills.

Engineered to withstand up to 2 months of weather exposure, this level 4 permanent crimson red chalk maintains clear, weatherproof lines despite sun, rain, and job site wear. It's suitable for marking a variety of surfaces including wood, plasterboard, concrete, stone, and metal. Whether you're working on large outdoor projects or detailed layout work, trust OX for reliable, long-lasting markings that perform well in any environment.