4-Pack 20mm Long Nib Deep Hole Marker Pens – Wood & Metal

Mark Deeper, Work Smarter — 20mm Long Nib Marker Pens

Take your precision marking to the next level with these 4-Pack 20mm Deep Hole Long Nib Marker Pens. Designed for professionals and DIY enthusiasts alike, these versatile markers feature an extra-long 20mm round-toe tip — twice the length of standard markers — making them the go-to tool for deep holes, tight spaces, and hard-to-reach surfaces. Made in Mainland China.

Why Choose These Long Nib Markers?

• Extra-Long 20mm Tip: Reaches deep holes, recessed cavities, and confined areas where ordinary markers simply can't go. Ideal for drilling, woodworking, glass installation, and metalwork.
• 72-Hour Cap-Off Durability: Won't dry out for up to 72 hours without the cap, so you can keep your workflow uninterrupted without worrying about the tip drying mid-job.
• Graduated Pen Body: Built-in measurement graduation on the barrel ensures more accurate, reliable markings — no need for a separate ruler for quick measurements.
• Waterproof, Fast-Drying Permanent Ink: Oil-based ink formula resists water, fading, and smearing. Dries fast for clean, lasting marks on wood, metal, glass, plastic, and more.
• Punch Positioning Ready: Precisely locate drilling and punching positions to reduce errors and boost efficiency in industrial and workshop settings.
• Multi-Surface Compatibility: Works on wood, metal, glass, plastic, stone, and paper — a must-have for carpentry, fabrication, construction, and art projects.

Key Specifications

Perfect For:

• Woodworking & carpentry marking
• Metal drilling & fabrication
• Glass installation & scoring
• Industrial deep-hole marking
• DIY home improvement projects
• Art, craft, and decoration work

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For guidance on safe handling of permanent markers and inks in the workplace, refer to OSHA's Hazard Communication standards.

Learn more: Zebra (pen manufacturer)

Frequently Asked Questions

Q: What surfaces can these long nib marker pens write on?

A: These 20mm deep hole marker pens work on a wide range of surfaces including wood, metal, glass, plastic, stone, and paper. The oil-based permanent ink adheres to most smooth and semi-porous surfaces, making them versatile for woodworking, metalworking, and general craft or industrial use.

Q: How long does the ink last without the cap on?

A: The ink is formulated to remain workable for up to 72 hours even without the cap on, so you won't lose precious time re-capping between tasks during longer projects or in busy workshop environments.

Q: Why is the 20mm long nib better than a standard marker for deep holes?

A: Standard marker tips are typically 8–10mm long, which makes it difficult or impossible to reach the bottom of deep holes, cavities, or recessed spots. The 20mm long nib on these markers extends your reach significantly, allowing precise, clean markings in areas that would otherwise require a different tool entirely.

Q: Is the ink waterproof and permanent?

A: Yes. The oil-based ink is water resistant, fast drying, and designed to be permanent — it won't fade, blush, or wash off easily, even in damp or outdoor workshop conditions.