Deep Hole Maker: The deep hole carpenter pencil designed with extended tip and 45mm tip length, reaching hard to reach areas where other carpenter markers don't go, suitable for marking through holes or in other narrow areas Built-in pencil sharpener for precise marks: the pencil sharpener is screwed into the top of the mechanical drawing pencils, which also won't get lost and your mechanical pencil will always be sharpened for great precision Mechanical pencil: the carpenter's pencil does not slip out of the fingers and repetitive drawings cause less pain; Pen clip design can be easily attached to the pocket, easy to use and not easy to lose, gaining efficiency, suitable for construction and masons Marks on various surfaces: the carpenter's pencil solid can draw on metal, plastic, glass, wood, paper, etc. Drawing pencil leads are durable, they are greasy for tracing anywhere and more resistant than hard lead; Yellow can be drawn on dark surfaces where gray lead does not draw Refillable for continuous use: woodworking marker is pre-filled with yellow lead, comes with a box refill included 3 gray wires and 3 yellow wires which can meet your long-term wood marking needs Two color refills They come in a box. Use yellow pencils for dark surfaces and gray pencils for light surfaces. Built-in sharpener It is screwed into the top of the pencil, which is not easily lost. It is convenient to sharpen your pencil whenever you want. More thoughtful details The non-slip handle is labor-saving. The pen clip can be easily attached to the pocket, which is not easy to lose. Delivery quantity: 1 set