Keson (103BLACK) Prochalk Semi-Permanent Marking Chalk, 3 lb, Black

Features:

• ProChalk Semi-Permanent chalk for weather- and water-resistant lines that hit and stick for a long time but will eventually wear away naturally.
• Exterior applications include concrete layout, roofing, metal fabrication
• Size: 3 lb
• Application: Produces Strong, Sharp Temporary Color Line
• For Use With: Chalk Line Reels