Deep hole maker: The deep hole carpenter pencil features an extended point and 45mm tip length, allowing access to hard-to-reach areas where other carpenter markers cannot reach, ideal for marking through holes or in tight spaces. Built-in sharpener for precise marks: The sharpener is securely screwed into the top of the mechanical pencil, preventing loss and ensuring the pencil remains sharp for accurate, clean lines. Mechanical pencil design: The carpenter pencil provides a secure grip to prevent slipping, reducing hand fatigue during repeated use. The pen clip allows easy attachment to pockets for convenient access and reduced risk of loss, enhancing efficiency on job sites, suitable for construction and masonry work. Marks on various surfaces: The pencil can mark on metal, plastic, glass, wood, paper, and other materials. The lead is durable, leaves clear marks, and performs better than standard hard lead. Yellow lead is visible on dark surfaces where gray lead may not show. Refillable for continuous use: The pencil comes pre-filled with yellow lead and includes a refill pack containing 3 gray and 3 yellow leads, meeting long-term marking needs. Two-color refills: Includes both yellow and gray leads. Use yellow on dark surfaces and gray on light surfaces. Built-in sharpener: Integrated sharpener attaches to the top of the pencil, remains secure, and allows quick sharpening as needed. Additional thoughtful features: Non-slip grip reduces hand strain. Pen clip enables easy pocket carry and helps prevent loss. Package Quantity: 1 set