20mm Deep Hole Long Nib Markers Set | Multi-Purpose Perforating Pen for Metal, Wood, and Glass

This 8-piece set of deep hole markers features a long nib head designed for precise marking in hard-to-reach areas. Each pen delivers waterproof, fast-drying ink that works on metal, wood, glass, and more, making it a versatile addition to any workshop or household toolkit.

These markers are built for accuracy and durability. The 20mm long nib reaches deep into holes and tight spaces, allowing you to mark drilling positions, perforation points, and decorative lines with confidence. The ink is water-resistant and dries quickly, reducing smudging and waiting time.

Each pen contains environmentally friendly ink free from xylene and other harmful substances. Whether you are working on furniture restoration, automotive manufacturing, or bathroom decoration, these markers provide clean, consistent lines that hold up to handling and light moisture.

The set includes five vibrant colors and a dedicated white pen for non-ferrous metals. This variety lets you color-code your work, highlight different materials, or match your project's aesthetic. The compact plastic body is lightweight and easy to grip, giving you control during detailed tasks.

Key Features and Benefits

- 20mm long nib head that reaches deep holes and recessed areas for precise marking

• Waterproof and fast-drying ink that resists smudging and holds up in humid environments

• Environmentally friendly formula free of xylene and other harsh chemicals for safer use

• Multi-surface compatibility on metal, wood, glass, and non-ferrous materials for one-tool versatility

• Set of 8 pens in black, blue, red, green, and white for color-coded organization and visibility

• Line width of 0.7-1.0mm for fine, clean marks that do not obscure your work

Who Is This For

- Woodworkers and carpenters who need to mark deep drill holes on shelves, cabinets, and frames

• Metalworkers and automotive technicians marking processing positions on parts and panels

• DIY enthusiasts and home decorators working on furniture restoration, bathroom upgrades, or craft projects

• Professionals in manufacturing and assembly who require waterproof, permanent markings on multiple surfaces

Usage Scenario

Mark was installing a new set of floating shelves in his bathroom. After measuring and leveling the brackets, he needed to mark the exact drill points inside the pre-drilled holes. His regular pencil could not reach the bottom of the 20mm deep holes, and the marks kept smudging on the tile backsplash. He switched to this long nib marker, inserted the tip into each hole, and made a clean dot on the wall. The ink dried in seconds and stayed visible even when he wiped away dust. He finished the job in half the time with no re-drilling.

Micro Comparison

Standard markers with short nibs cannot reach deep into holes or recessed areas, forcing you to guess or measure twice. This set solves that problem with a 20mm long nib that marks exactly where you need it. The waterproof, fast-drying ink also outperforms pencils and washable markers, especially in bathrooms, basements, and outdoor workshops where moisture is a concern.

Specifications

Material: Plastic

Head Tip Length: 20mm / 0.8 in

Line Width: 0.7-1.0mm / 0.03-0.04 in

Colors: Black, Blue, Red, Green, White

Ink Type: Waterproof, Fast Drying, Xylene-Free

Application: Woodworking, Metal Processing, Automotive, Furniture Decoration, Bathroom

Please allow 1-3 cm / 0.4-1.2 in difference due to manual measurement. Colors may appear slightly different depending on your display settings.

Package Includes

- 8 x Long Nib Head Markers (Black, Blue, Red, Green, White)

Why You Will Love It

You will appreciate how easily these markers reach deep into holes and tight corners, saving you time and frustration. The waterproof ink means your marks stay put even in damp conditions, giving you confidence that your drilling or cutting lines are accurate. With five colors in one set, you can keep your projects organized and your workspace efficient.

Questions and Answers

Question: Can I use these markers on wet surfaces?

Answer: The ink is waterproof after drying, but for best results, apply on clean, dry surfaces.

Question: Is the white pen for all materials?

Answer: The white pen is specifically designed for non-ferrous metals. It may not work well on wood, glass, or other surfaces.

Question: How long does the ink take to dry?

Answer: The ink dries in a few seconds on most surfaces, but drying time may vary slightly depending on material and humidity.

Question: Are these markers refillable?

Answer: No, these are disposable markers. When the ink runs out, replace the pen.

Question: Can I use them for permanent marking on glass?

Answer: Yes, the ink works on glass and is waterproof once dry. It may be removed with a solvent if needed.