Zeluga 7in. 72 Pc. Woodworking Marking Tool Octagonal Red Hard Black Lead Carpenter Pencil. These pencils are not easy to break and used to mark on rough, hard and uneven surface materials. For use with cardboard, timber, paper, concrete, unfinished lumber, wood, plywood, brick and much more. Prevents from rolling off, easier to grasp and very comfortable to hold with its octagonal design. It is made of graphite lead and natural wood with bright red color that makes easy to find where it was used previously. Includes 72 pieces of pencils, its measures 6.9inch/175mm long and 0.51inch/13mm width. Recomended for wood workers, contractors, craftsmen, builders, tradesman etc.