These deep hole long nib markers are built for precision marking on hard surfaces. With a 20 mm nib, they reach into deep holes and tight spaces that standard markers cannot. The ink is waterproof and quick-drying, making them a reliable choice for woodworking, metalwork, and bathroom projects.

Each marker features a durable metal tip that stays sharp for thousands of marks. The body is designed for comfort and control, even during long work sessions. Whether you are a carpenter, mechanic, or DIY enthusiast, these markers help you get accurate lines every time.

Available in red, blue, and black, you can choose solid color sets or mixed packs to suit your workflow. The ink bonds to porous and non-porous surfaces, including wood, glass, tile, and metal. This multi-purpose tool replaces the need for multiple marking devices, saving time and money.

These markers are ideal for perforating, positioning, and general layout work. The long nib gives you access to recessed areas without disassembly. This feature is especially useful for automotive repairs, cabinet making, and plumbing installations.

Key Features and Benefits

- 20 mm long nib that reaches 15 mm deep holes for marking hidden areas without disassembly

• Waterproof and quick-dry ink that stays legible on metal, wood, tile, and glass

• Durable metal tip that delivers over 100,000 marks for long-lasting use

• Comfort grip body that reduces hand fatigue during repetitive marking tasks

• Versatile color options in red, blue, and black for color-coded project organization

Who Is This For

- Carpenters and woodworkers who need to mark deep mortises and hidden joints

• Mechanics and auto repair professionals who mark engine parts and bolt holes

• DIY home improvers working on tile, glass, or bathroom installations

• Contractors and tradespeople who require a waterproof marker for outdoor or wet conditions

Usage Scenario

Mark was installing a custom bathroom vanity. He needed to mark drill points on tile for the faucet holes. A standard marker could not reach the recessed area behind the tile edge. He switched to this deep hole marker. The 20 mm nib slid into the tight gap and left a clean, waterproof mark. He drilled exactly on the line, and the vanity fit perfectly on the first try.

Micro Comparison

Standard markers often fail on greasy or wet surfaces and cannot reach into deep holes. These markers use a longer nib and waterproof ink to handle those exact challenges. They are built to last longer than typical hardware store markers, making them a better value for frequent use.

Specifications

Material: ABS plastic body with tungsten carbide nib

Pen length: 13.7 cm / 5.4 in

Nib length: 20 mm / 0.78 in

Pen diameter: 1.5 cm / 0.59 in

Ink type: Waterproof, quick-dry

Color options: Red, Blue, Black

Quantity per pack: 8 markers

Please allow 1-3 cm / 0.4-1.2 in difference due to manual measurement.

Package Includes

- 8 x Deep hole long nib markers (color set as selected)

Why You Will Love It

You will love how easily these markers reach into tight spots that other pens cannot. The waterproof ink stays put on all your project surfaces, so your marks are always accurate. With a long-lasting nib and comfortable grip, these markers are a simple upgrade that makes every job easier.

Questions and Answers

Question: Can these markers write on wet surfaces?

Answer: Yes, the ink is waterproof and works on damp wood, metal, and tile. It dries in about 3 seconds.

Question: What is the nib length?

Answer: The nib is 20 mm / 0.78 inches long. It can reach into holes up to 15 mm deep.

Question: Are the markers refillable?

Answer: No, these are disposable markers. Each one lasts for over 100,000 marks.

Question: Do you sell single colors?

Answer: The pack includes 8 markers. You can choose solid red, blue, or black, or a mixed set.

Question: Will these markers work on glass?

Answer: Yes, the ink bonds to glass. It is waterproof and does not smudge once dry.