UCT1197 Features: * 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 * 4-1/2"" x 1/2"" ground point * Green