DIXON TICONDEROGA 52100 Blue Lumber Crayon
Extruded lumber crayons last up to ten-times longer than ordinary molded wax crayons. Fadeproof, waterproof, smearproof. Won't melt in direct sunlight. Will work on wet (green) lumber or dry wood, metal, concrete and most other surfaces. Hex shaped 4-1/2 x 1/2 in to fit lumber crayon holders.