Irwin Permanent Staining Marking Chalks 8 Oz Permanent Black 6 BX (586-64908)

Marks are temporary. Provides greater visibility in standard lighting conditions. Durable formula is weather-resistant and suitable for interior or exterior use. Use to show layout changes and corrections on metal concrete lumber plastic cardboard and other surfaces. IRWIN Tools STRAIT-LINE 64908 Permanent Marking Chalk 8-ounce Black 64908.