1. The 45mm deep hole marker tip will keep you busy while marking or writing. 45mm long extended pointed deep hole marker for reaching hard to reach places that other woodworking markers cannot, ideal for marking through holes or other narrow areas2. Our pencil construction site has a built-in sharpener: If you have a mechanical pencil, you may need to bring extra splatter. This carpenter's pencil has a built-in sharpener that is screwed on top of the deep hole markers. It doesn't get lost either, and your drill marks are always sharpened for beautiful precision. As practical as a regular mechanical pencil or a carpenter's pencil3. With its sturdy clip, you can easily carry this practical deep hole marker on the construction site: The pen clip is designed to hang easily on the bag, easy to use and not easy to loose. The carpenter's pencil also won't slip out of your fingers, and repeated markings will reduce pain. This marker tool is great for building and brick layers4. 3 black and 3 yellow replacement leads allow the carpenter pencil construction site craft DIY tool to work for a long time. You can use this craft DIY tool for a long time, pencil can also write on metal, plastic, wood, paper. Yellow deep hole markers can be drawn on dark surfaces5. Depth Hole Marking Pencil Can Be Used With Many Marking Tools: This mechanical pencil can be used with marking tools or measuring tools, such as mitered corners, woodworking squares, combined corners, stop corners and more.