We have specially standard 2.8mm round refill replacement that can easily adapt to various mechanical pencil holders, allowing you to freely expressing your creativity Our carpenter pencil refill is selected from, ensuring that each refill have excellent hardness and smoothness, providing you with a more comfortable writing and drawing Our carpenter pencil refill can be used in a wide application, including woodworking, writing, drawing, sketches, and more, providing you with a stable and long writing Our packaging box have a unique that makes it easy to open and access the refill Ensuring storage and retrieval while also protecting the refill from damage during transportation Due to its high hardness and smoothness, our refill is more durability and less prone to breakage, allowing you to continuously unleash your creativity, Manufacturer: Bottone