Irwin 1/2 in. x 4-1/2 in. Yellow Lumber Crayon

The Irwin 1/2 in. x 4-1/2 in. Yellow Lumber Crayon is designed for clear, long-lasting layout and marking on tough jobsite materials. Formulated to be waterproof and non-toxic, it leaves vivid marks on lumber, concrete, metal, ceramics, and masonry. Built to perform in demanding conditions, this marking crayon writes smoothly on wet, oily, cold, slick, or dry surfaces, making it an essential layout tool for construction, framing, roofing, and general industrial applications.