1Graphite Material: Carpenter pencil refill replacement is made of graphite, which is smoothly, strong, long lasting and not easy to break, making it a good choice for your pencils. 2Wide Application: Waterproof and durable carpenter pencil refills can be used in many places such as woodworking, construction, writing, painting, sketching, construction and many more. 324Pcs: There are 24 pieces pencil refills and 4 storage boxes in the package in total, every box has 6 slots for storing the pencil, easy for your carrying and pencil keeping. 48mm Diameter: With a standard 8mm diameter, these pencil refills are suitable for most brands of carpenter pencils and most brands of mechanical pencil holders on the market. 5Ideal Replacement: Adopts premium graphite material, with excellent performance, these pencil refills are ideal backups and replacements for the old and used up.