Irwin 4935526 Strait-Line 4-lb Permanent Staining Marking Chalk - Midnight Black
• 4-lb Chalk Line Refill
• Midnight Black Permanent Staining Marking Chalk
• For Exterior use
• Visible after weeks of weather exposure and jobsite wear
• Stains Surface and Reduces need for spray sealant
IRWIN STRAIT-LINE Permanent Staining Chalk is great for extreme outdoor conditions because it can withstand harsh weather conditions and months of jobsite wear. Chalk containers are filled by weight not volume.