Irwin Strait-Line Permanent Staining Chalk Size:4 lbs fast-setting joint compound is easily

fast-setting joint compound is easily removed from the finishing box

Each spring-loaded pole takes seconds to set up without a ladder

Used for 4-786 12" Classic Flat Box/4-789 12" Classic MEGA Flat Box

Hardened and tempered blade for durability and long life

Irwin Strait-Line Permanent Staining Chalk Size:4 lbs fast-setting joint compound is easilyIRWIN 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. Features Great for chalk line refill Permanent staining marking chalk For exterior use Visible after weeks of weather exposure and jobsite wear Stains surface and reduces need for spray sealant