The Tolsen 42020 is a specialized construction pencil designed for precise marking on wood, drywall, and masonry. These red pencils feature an octagonal shape that prevents them from rolling away on flat surfaces, ensuring they stay exactly where you put them during a project. Each pencil measures 176×15×7.5 mm and utilizes a substantial 6.0×2.0 mm lead, which provides the durability needed for rougher building materials. Supplied in a colored box, this set includes 12 pieces, making it a practical choice for professionals or DIY enthusiasts who need a reliable supply of markers for various job sites.