- Extended Reach Design: Ideal for marking deep holes, tight spaces, and recessed corners, these deep hole marker pens provide the accessibility you need for precision marking. - Versatile Performance: Compatible with various surfaces including metal, wood, glass, and plastic. The waterproof formula features quick-drying and smudge-proof properties, ensuring your markings are durable and legible under all conditions. - Broad Application: Perfect for home decoration, hardware processing, and automobile manufacturing. These markers are essential for professionals in construction, manufacturing, and DIY projects, making them a reliable tool for any task. - Durable and User-Friendly: The long, thin, round nib design allows for easy handling, while the permanent ink guarantees that your markings are waterproof, smudge-proof, and quick-drying, providing long-lasting results. Use Scenarios: 1. Marking deep holes in cabinetry during renovations to ensure precise drilling. 2. Labeling components in automotive manufacturing for improved organization and efficiency. 3. Creating clear markings on various materials for DIY projects, ensuring accuracy and visibility.