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.