Long Nib Marker Professional Carpenter Marker Set is designed for tight spaces, with a long, thin tip that easily inserts into deep holes, crevices and other hard-to-reach areas. It lets you mark nail holes, screw holes, or pinpoint positions on wood, metal, plastic, and other materials for delicate work. The markers use quick-drying, waterproof ink to leave long-lasting, clear marks on a wide range of surfaces including aluminum, concrete, glass, and metal. The ink resists fading in humid environments, meeting varied marking needs. Each pen body features a built-in 6 cm scale for quick and accurate measurements, improving efficiency and accuracy during marking and layout tasks. This practical scale design makes the tool a helpful addition to your toolkit for many projects. Made of high-quality PP material, the Long Head Deep Hole Marker offers durability and a comfortable grip to reduce fatigue during extended use. Suitable for professionals and DIY enthusiasts, it maintains strong performance across different work environments. Use scenarios: - Mark layout points for nail and screw holes in tight framing, furniture assembly, or deep drilling tasks. - Align and mark drill points on metal surfaces, aluminum profiles, or plastic components in confined spaces. - Mark precise positions on wood, plastic, or composite parts where space is limited or access is restricted.