The Irwin 66501 is a 6-Piece Red Lumber Crayon. These 4 1/2-Inch crayons are easy to use on the job and makes marking simple. Features: * For use on oily, slick, wet, cold or dry surfaces. * Ideal for lumber, concrete, ceramics, and metal. * Non-toxic, waterproof. What"s In the Box: * Irwin 66501 Red Lumber Crayon 6-Piece