The Pica-Ink 150/40 is a professional deep engraving marker, specially designed to provide precision in areas where common markers fail to reach. It features an elongated stainless steel tip that allows it to easily mark through narrow holes and hard-to-reach spots, making it the ideal tool for carpenters, craftsmen, and installers. Its permanent ink is resistant to water and abrasion, while drying quickly on almost all surfaces, such as metal, plastic, glass, and wood. Additionally, its smart cap includes a special clip for easy one-handed operation and secure retention in the work pocket, ensuring that the marker is always ready for use.