The Pica Dry 150/40 Marker for Deep Holes, Red is a refillable permanent marker built for layout work where ordinary marker bodies are too bulky to reach. This is a deep-hole marker designed for marking through narrow access points on jobsite materials. Model Number: 150/40. If you do installation work, electrical rough-in, cabinet fitting, metal fabrication, or general punch-list layout, this marker solves a very specific problem: making a visible mark exactly where your hand and a regular tip cannot easily get.

What makes this marker useful is not just the red ink. It is the long, slim writing tube paired with a fine 1.5 millimeter tip. That combination lets you mark inside drill holes, hardware mounting points, box openings, and other recessed locations without having to guess the center or drag a line from the edge. On the job, that means fewer bad transfers and less rework when you are laying out parts that need to line up the first time.

The refillable construction is another practical advantage. For anyone who burns through markers in a truck, pouch, or shop apron, a refillable deep-hole marker makes more sense than a throwaway pen. The writing tip is also designed to be revived by twisting, which helps extend usable life before replacement or refill. That is the kind of detail pros appreciate because it keeps a simple tool working longer.

In day-to-day use, the body shape is made for handheld control, and the cap-style design helps protect the fine tip when the marker is riding in a pocket or tool bag. The marker is listed as suitable for surfaces including wood, cardboard, and plastic, and product imagery also supports use on sheet metal and installation surfaces where a narrow marking point is helpful. The red ink stands out well for visible layout lines and transfer points.

This is not a broad-tip general-purpose marker meant for bold labeling across boxes or lumber ends. It is a purpose-built layout marker for hard-to-reach spots and more exact positioning. That is the difference. If your work regularly involves mounting hardware, tracing behind assemblies, marking through guide holes, or reaching into electrical and mechanical openings, a deep-hole marker like this earns its keep fast.

The best fit for this marker is tradespeople and serious DIY users who need neat, repeatable marks in confined spaces. Electricians, installers, carpenters, metalworkers, remodelers, and maintenance techs are the obvious crowd. If you are just writing on open, flat surfaces all day, a standard permanent marker will do. If you need access and control in tight spots, this Pica is the right style of marker.

Pica Dry 150/40 Marker for Deep Holes, Red is a smart fix for a real jobsite annoyance

This is the kind of specialty marker you do not think much about until you need to mark inside a tight opening and a regular marker leaves you hanging.

• Who it's for: Electricians, installers, carpenters, metalworkers, and anyone doing layout work through recessed holes or narrow openings.
• Why it stands out: The deep-hole design and 1.5 millimeter tip make it much more useful than a standard permanent marker for transfer marks and tight-access layout.
• Worth knowing: This is a purpose-built precision marker, not a broad marker for general labeling. If your work needs reach and control, it makes sense. If not, a regular marker is cheaper.

• Is this marker refillable? Yes. The product data lists the Pica Dry 150/40 Marker for Deep Holes, Red as refillable.
• What size is the writing tip? The tip diameter shown in the product information is 1.5 millimeters.
• What kind of marker is it? It is listed as a permanent marker designed for deep-hole marking.
• What surfaces is it recommended for? The available product data names wood, cardboard, and plastic as recommended surfaces.