

Irwin Strait-Line Marking Chalks Have A Newly 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. The Flip-top Cap, Seals The Chalk In An Air-tight Chamber, Keeping Out Moisture And Reducing The Risk Of Clumping.
Irwin Strait-Line Marking Chalks Have A Newly 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. The Flip-top Cap, Seals The Chalk In An Air-tight Chamber, Keeping Out Moisture And Reducing The Risk Of Clumping.