Overview This set of 4 black pencil refills (24 pieces total) is designed for carpenters, builders, and DIY enthusiasts who require clear, durable markings in various working conditions. Made from high-quality waterproof graphite, these refills provide precise, long-lasting lines even in wet environments, ensuring reliable performance for woodworking, construction, and creative projects. Product Details Crafted from high-hardness graphite with strong stability, these refills resist moisture and water, preventing marks from washing away. With a diameter of 2.8mm and a length of 150cm, they easily reach narrow gaps and deep holes where standard markers cannot. Suitable for use on surfaces such as glass, tile, metal, wood, and paper, they are compatible with carpenter pencils, mechanical pencils, and similar tools. The included storage case keeps refills organized and portable, making them a practical gift for professionals and hobbyists alike. Key Features 1. Multi-Pack Value Set: Includes 4 boxes of black pencil refills, totaling 24 pieces, ideal for clear and accurate marking in carpentry, construction, and various DIY tasks. 2. Waterproof & Durable Material: Made from high-quality graphite that is moisture-resistant and waterproof, ensuring marks remain intact even under heavy rain or damp conditions. 3. Precision Marking: The 2.8mm diameter and 150cm length allow access to tight spaces and deep holes, providing superior accuracy for detailed work. 4. Versatile Compatibility: Works on multiple surfaces including glass, ceramic, metal, wood, and paper. Fits carpenter pencils, mechanical pencils, and standard pencil holders. 5. All-Purpose Utility: Perfect for woodworking, construction, artistic projects, and more. The included storage case ensures easy organization and makes these refills a thoughtful gift choice.