Long tip design: Our long-head deep-hole marking pen is equipped with a 20-millimeter slender tip, with a tip width of 1.5mm. It is specially designed for marking in narrow spaces and deep holes, and is highly suitable for applications in construction marking and metal marking pens. Each can write approximately 200 meters. Multifunctional marking tools: These marking pens are not only suitable for the construction field, but also for furniture decoration, automotive manufacturing and processing industries. The long-head deep-hole marking pen is very suitable for precise marking in various environments. Quick drying and waterproof formula: Enjoy the convenience of permanent marking pens. They dry quickly and do not fade easily. These deep-hole marking pens can effectively mark on various surfaces such as metal, wood, concrete and plastic, ensuring that your markings remain clear and visible in any environment. Precise measurement function: The side of each long-head deep-hole marking pen is equipped with a 60-millimeter ruler, making it convenient for you to conduct precise measurements during work. This thoughtful improvement greatly enhances the practicality of these marking pens, making them an indispensable tool in any project. Comfortable to use: Our marking pens are made of high-quality PP material, which is sturdy. Their ergonomic design ensures comfort during long-term use, making them a reliable tool trusted by carpenters and DIY enthusiasts.