Lumber crayon. Standard for permanent marks, outdoors or indoors. Highest quality clays and pigments are ground, reground and mixed, and homogenized. Marks lumber, steel, concrete, and all rough surfaces. Waterproof, fade-proof, and smear-proof. Paper-wrapped hexagonal shape. 4-.50" x .50" ground point. Soft Red. Length: 3.5. Width: 4.75. Height: 1.25