Irwin Strait-Line 8oz Marking Chalk


Blue Chalk - Standard Marking Chalk Features

  • Interior or exterior use
  • Marks are temporary
  • Provides great visibility

Red Chalk - Permanent Marking Chalk Features

  • Exterior use
  • Visible after weeks of weather exposure and jobsite wear

Orange Chalk - Hi-Visibility Features

  • Use to show layout changes and corrections on metal, concrete, lumber, plastic, cardboard and other surfaces.
  • Durable formula is weather-resistant and suitable for exterior use.
  • High-visibility chalk is Ideal for low light conditions and on dark surfaces.