The Pica 150/46/SB Black Ink Marker For Deep Hole is a permanent marker built for marking hard-to-reach spots on dry surfaces. This is a deep-hole marker designed for layout and marking in narrow, recessed, or obstructed areas. Model Number: 150/46/SB. If you need to mark inside drilled holes, around installed hardware, or in spots where a regular marker tip cannot reach, this is the tool that makes the job easier.

What matters here is the tip design. Pica uses an extended stainless steel marking tip, which gives this marker real reach for joinery, rough-in work, fabrication, and general jobsite layout. Instead of trying to angle a fat-bodied marker into a tight opening, you can put the tip where the mark actually needs to go. That saves time and helps keep your layout accurate.

The black ink is permanent and intended for marking on almost all kinds of dry surfaces. For tradespeople and serious DIY users, that means one marker can cover a lot of common tasks, from wood and metal layout to jobsite reference marks. The line size is listed at 1.5 mm with a bullet tip, which gives you a mark that is visible without getting too sloppy for tighter work.

Pica also builds in some practical design touches that matter more than they sound on paper. The quiver cap includes a special clip for one-handed handling, so the marker is easier to carry and quicker to grab when you are moving through repetitive marking tasks. On a ladder, at a bench, or working through punch-list details, that kind of convenience is the difference between a tool you keep using and one that gets left in the truck.

Another useful detail is the self-adjusting nib design. According to the product data, it can use more of the fiber nib length as it wears, which helps extend marking life compared to a typical marker that gives up early once the tip shortens. If you go through markers regularly, that added usable tip length is a practical advantage, not just a spec-sheet talking point.

This Pica marker is a good fit for carpentry, electrical, plumbing, HVAC, metalworking, general construction, and shop layout work. It makes the most sense for anyone who constantly has to mark deep holes, anchor points, pass-throughs, hidden edges, or other tight access areas. If your normal permanent marker cannot reach where the mark needs to go, the Pica 150/46/SB Black Ink Marker For Deep Hole is the right answer.

Pica 150/46/SB Black Ink Marker For Deep Hole gets into spots your regular marker cannot

This is the kind of simple tool that earns its place fast once you start doing layout in tight spaces.

• Who it's for: Contractors, installers, fabricators, and DIY users who need to mark inside holes, behind hardware, or in other cramped access points.
• Why it stands out: The extended stainless steel tip and permanent black ink solve a real problem that standard markers do not handle well.
• Worth knowing: This is a specialized marker, not just a regular shop pen. If most of your work is flat, open-surface marking, the deep-hole design matters less. If you do install work, it matters a lot.

• What makes this marker different from a standard permanent marker? The main difference is the extended stainless steel tip, which is designed to reach into deep or tight areas where a standard marker body and tip cannot fit.
• What kind of surfaces can it mark? The product data states that it marks on almost all kinds of dry surfaces.
• Is the ink permanent? Yes. It uses permanent black ink, and the product data notes that it can be removed from glossy surfaces with alcohol and other suitable solvents.
• How thick is the mark? The listed line size is 1.5 mm with a bullet tip.