Pack of 2 Black Marking Crayons for use on oily, slick, wet, cold, or dry surfaces Ideal for marking lumber, concrete, ceramics, rubber, metal, paper, cardboard, etc. Wax-based crayons, non-toxic, lead free and waterproof. Weather, fade and water resistant. 

Key features:

• 2 pack
• Wax-based
• Non-toxic
• Lead free and waterproof
• Suitable for marking lumber, concrete, ceramics, rubber, metal, paper, cardboard