Industrial Formulation: Utilizing an extruded clay-wax formula, these crayons are completely fade-proof, waterproof, and smear-proof. They are temperature-rated to withstand direct sunlight without melting or softening.

Surface Flexibility: Designed to write boldly and clearly on tough, irregular surfaces such as wet (green) lumber, dry wood, structural steel, concrete, and masonry.

Design & Packaging: Formatted with a standard hexagonal shape (4-1/2" x 1/2") to ensure it won't roll off workspace surfaces and to guarantee compatibility with your Dixon walnut crayon holder. It comes packaged in a bulk box containing 12 crayons.