🧲✏️ BitPen – The Clever Cousin of the Screwdriver and the Pencil

A pencil? A screwdriver? A minimalist magic wand?

The BitPen is all of that—and a little more.

Because life is full of loose screws and great ideas… and you’d better be ready for both!

🧠 How does this little wonder work?

Up front, it holds a standard 1/4” hex bit—

but not just any bit: this one writes instead of tightens.

It’s an infinite pencil (yep, one of those that never runs out… or almost).

All you need is a 1/4” eternal pencil refill like this: infinite pen aliexpress or infinite pen amazon

and a countersunk magnetic M2 screw to hold it from the inside.

Oh, and don’t forget a 5×2 mm neodymium magnet to keep the tip locked in place like magic.

Without it? Chaos. Pure chaos.

🔧 What if I actually need to screw something in?

No problem. Just swap the pencil bit for any standard 1/4” screwdriver bit—easy.

Plus, the BitPen has a secret storage hatch at the back to carry extra bits:

• The compact model fits 2 extra bits (plus the pencil = 3 tools in total).

• The long model holds 4 extras (5 tools total in your pocket!).

And the rattling? Nope.

The rear cap features an optional TPU insert that acts as a soft stop,

so the bits don’t jingle like maracas in your pocket.

Don’t mind the noise? Leave it out. Your call.

📏 An EDC design for people who don’t want to carry a toolbox

Small, handy, and with more tricks than a Swiss Army knife,

the BitPen is built to follow you everywhere:

desk, backpack, workshop, hiking trip, boring meeting, or that drawer of “random useful stuff.”

🛠️ What do you need to assemble it?

• A 1/4” infinite pencil refill 

• A countersunk magnetic M2 screw

• A 5×2 mm neodymium magnet

Printed in PLA+ eSUN without issues.

Threaded parts and the cap fit are quite tight with my print profile,

but they loosen up slightly after a few uses, resulting in a perfect and snug fit.

🔩 M2 Screw Installation

The M2 screw is installed in the rear part of the 1/4" adapter for the infinite pencil tip.

It must be screwed in this position so that:

• it can interact with the magnet
• and provide magnetic retention

👉 This is necessary because the pencil adapter itself has no magnetic metal parts, so without the screw it would not stay properly secured and could fall out.

🔄 CAP UPDATE

I’ve updated the cap design to improve both strength and usability.

⸻

🔧 New 2-part design

The cap now consists of two separate parts:

• The clip is printed separately in horizontal orientation
👉 This greatly improves resistance to breaking

• The clip is attached to the cap using:
• mechanical locking features
• a small drop of cyanoacrylate glue

👉 This combination provides significantly higher strength compared to the previous version

⸻

✏️ Improved fit

I’ve added relief grooves in the connection area to the BitPen:

• Before: the fit could feel too tight
• Now:
👉 putting on and removing the cap is much easier and smoother

⸻

🧲 Compatibility

• The original cap is still available in the print profile
👉 You can choose whichever version you prefer

⸻

🖨️ PRINTING

• The new cap requires minimal supports

⚠️ Important:

👉 It is highly recommended to use my print profile

• If supports are generated in the wrong areas, they can be difficult to remove
• Using the included profile:
👉 supports are very easy to remove
👉 and are fully optimized

⸻

🆕 BITPEN V2.0

There is now also a BitPen V2.0, which adds a new feature:

👉 Integrated Victorinox tweezers in the cap

• No need to reprint the entire model
• ✅ You only need to print the V2.0 cap
• 🔁 It is fully compatible with BitPen 1.0

⸻

💬 This update is focused on making the BitPen stronger, easier to use, and more versatile for everyday carry.

BitPen: Write. Repair. Repeat.