These Dixon Lumber Marking Crayons lasts up to 10 times longer than ordinary molded wax crayons. They are fade-proof, water-proof, smear-proof and won't melt in direct sunlight. They will work on wet (green) lumber or dry wood, metal, concrete and most other surfaces. Each hex-shaped crayon measures 4.5 inches long x 1/2-inch wide to fit lumber crayon holders.
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.