The Pica 170/40/SB Red Ink Marker For Deep Hole is a permanent deep hole marker built for trade work where a regular marker tip cannot reach. This is a permanent deep hole marker designed for layout and marking on dry jobsite materials. Model Number: 170/40/SB. If you need clear red marks on wood, metal, concrete, tile, glass, cardboard, or pipe, this one is made for that kind of work.

What separates this marker from a standard permanent marker is the tip design. The 2-4 mm tip gives you the flexibility to make visible marks while still fitting into narrow openings and drilled holes. That makes it useful for installers, carpenters, electricians, plumbers, HVAC techs, and remodelers who mark through hardware, around anchors, inside openings, or along layout lines on mixed materials.

Pica calls it a Smart-Use marker because it does two jobs at once: it works as a general permanent marker and as a deep hole marker. In practical terms, that means you are not carrying one marker for surface lines and another for hard-to-reach spots. The reversible nib also matters. When one end wears down, you can flip it and keep working, which helps you use more of the ink before replacement.

The included quiver cap is not just packaging filler. It gives you a better way to keep the marker on hand while moving around the job. That is useful on ladder work, punch lists, cabinet installs, framing layout, and mechanical rough-in where tools and marking gear tend to disappear into pockets or get left behind.

Surface range is another strong point here. Source data lists compatibility with stone, concrete, metal, wood, dry lumber, PVC pipe, glass, wet and dry tile, dry rubber, and cardboard. That broad surface range makes this red permanent marker a solid fit for contractors who bounce between rough construction materials and finished surfaces in the same day.

At 6.22 inches overall length, the marker has enough body to control easily without feeling tiny in the hand. It is still compact enough for everyday carry, and the red ink stands out well for quick reference marks, cut lines, drill points, and install locations.

If your work regularly involves deep access marking, hardware placement, or layout on mixed materials, this is the kind of marker that earns its spot fast. The Pica 170/40/SB Red Ink Marker For Deep Hole makes the most sense for pros who are tired of blunting standard marker tips or fighting to reach the actual mark point.

Pica 170/40/SB Red Ink Marker For Deep Hole Gets the Jobsite Details Right

This is the kind of marker that seems simple until you use it on real work and realize how much easier deep, accurate layout marking becomes.

• Who it's for: Pros and serious DIYers who mark through holes, inside tight openings, or across mixed materials like wood, metal, concrete, tile, and pipe.
• Why it stands out: The deep hole design, reversible nib, and quiver holder make it more useful than a basic permanent marker.
• Worth knowing: It is sold as a 1-pack, so if you burn through markers on crews or across multiple bags, you will probably want more than one.

• What kind of marker is this? It is a permanent deep hole marker designed for marking both open surfaces and hard-to-reach points.
• What surfaces can it mark on? Source data lists stone, concrete, metal, wood, dry lumber, PVC pipe, glass, wet and dry tile, dry rubber, and cardboard.
• Does it have a reversible nib? Yes. The nib is reversible to help extend marker life.
• Does it include a holder? Yes. This model includes a quiver cap or holder.