Keson Railroad Chalk (2 Boxes of 72 Each)

The Keson Railroad Chalk leaves highly visible and temporary marks on almost any surface. Engineered for smoother marking and bolder, brighter marks, this 4 x 1-inch railroad chalk is ideal and safe to use on metal, wood, stone, paperboard, cardboards, and on most surfaces. Also, this railroad chalk is compatible with Keson Railroad Chalk Holder.