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.