The Tolsen 42022 carpenter pencil is designed for marking on rough surfaces where a standard pencil would fail. These pencils feature a distinctive oval shape that prevents them from rolling away on a workbench or sloped surface, keeping your tools exactly where you need them during a project. Each color box contains 12 pieces, available in a bi-color red and blue variant. The pencils measure 10 x 7.5 x 176 mm and utilize a sturdy lead measuring 4.0 x 2.0 mm, which provides the durability required for frequent use on wood, stone, or concrete. This set is a practical choice for tradespeople and DIY enthusiasts who need reliable, high-visibility markings across various construction materials.