Add a Pen to Your 58mm Swiss Army Knife

Your 58mm Swiss Army Knife handles cutting, filing, and opening. Now it writes too. The Versa58 Pen Scale adds a slide-out ballpoint pen with a premium German Troika refill. It snaps on in seconds and removes just as easily. No glue. No grinding. No permanent modification. Compatible with 58mm Swiss Army Knives with Cellidor (plastic) scales. Not compatible with Alox models.

Versa58 Pen Scale: What You Need to Know

Is this compatible with my Swiss Army Knife?
Yes. Compatible with 58mm Swiss Army Knives with Cellidor (plastic) scales, including Classic SD, Rally, Jetsetter, Rambler, Midnite Manager, and MiniChamp. Not compatible with Alox models.

Will this damage my Swiss Army Knife?
No. The scale attaches to the existing brass rivets without altering the knife’s chassis, tools, or frame.

Is it reversible?
Yes. The Swiss Army Knife itself is completely unaffected. Original Cellidor scales can be reinstalled, though fit may not be as tight after removal.

What does this replace?
It replaces one stock Cellidor scale with a machined scale that houses a slide-out ballpoint pen. All knife tools remain accessible.

What tools do I need to install it?
None. The Pen Scale snaps directly onto your Swiss Army Knife in under 30 seconds.

Versa58 in the Press

The Versa58 system was funded at 560%+ on Kickstarter as a "Project We Love," backed by 1,200+ supporters.

See the original Versa58 Kickstarter campaign.

Watch Jon Gadget’s review of the Versa58 system.

Read the Gear Patrol feature on the Keyport Versa58 system.

Read The Gadgeteer’s hands-on look at the Versa58 modular platform.

Read the Yanko Design feature on upgrading your Victorinox 58mm Swiss Army Knife with Versa58.

Why Upgrade Your 58mm Swiss Army Knife?

Your 58mm Swiss Army Knife is one of the most carried pocket tools in the world, but its configuration is fixed from the factory. Permanent modifications can add capability at the cost of the knife’s integrity. Versa58 gives you a third option: modular scales that snap on and off without tools, adhesive, or risk. Add a pen today, swap to a flashlight tomorrow. Your knife stays intact. Your setup evolves with you.

About the Versa58 Pen Scale

The Versa58 Pen Scale is a machined replacement scale that adds a slide-out ballpoint pen to any compatible 58mm Swiss Army Knife. It uses a premium German-made Troika refill, pre-installed and ready to write out of the box. The pen slides out from the base of the scale, writes smoothly, and tucks back in flush when not in use.

Available in 6061 aluminum or Grade 5 titanium. Both variants are precision-machined, weigh 10g, and match the footprint and feel of the 58mm format. The titanium version is more wear-resistant with a distinct matte finish. The aluminum version offers the same functionality at a lower price point.

No tools, no adhesive, no modification. Snap it on, snap it off.

Beyond the Swiss Army Knife

The Versa58 Pen Scale also works as a standalone tool with a MagMount, sold separately. Pair it with the Pocket Flare for a two-tool keychain setup: pen and flashlight, no Swiss Army Knife required. Attach it to a keychain, clip it onto a backpack, or keep it on your desk.

How Does the Versa58 Pen Scale Compare?

Versa58 Pen Scale Specifications

• Materials: Scale body in 6061 aluminum or Grade 5 titanium
• Pen Refill: Troika 99Z119, German-made, black ink, medium point, approximately 1mm line width
• Dimensions: 14mm × 58mm × 4.8mm
• Weight: 10g
• Compatibility: 58mm Swiss Army Knives with Cellidor scales
• What’s Included: 1× Versa58 Pen Scale, 1× Troika refill pre-installed
• What’s Required: A 58mm Swiss Army Knife with Cellidor scales or a MagMount for standalone use
• What’s Not Included: Swiss Army Knife, MagMount, MagDock, or other Versa58 scales
• Sold Separately: Replacement Troika 99Z119 refills

Compatibility & Requirements

Compatible models: Any 58mm Victorinox Swiss Army Knife with Cellidor scales, including Classic SD, Rally, Jetsetter, Rambler, Midnite Manager, MiniChamp, and other 58mm models with Cellidor scales.

Not compatible: Alox models.

Installation: Tool-free. Snap on and off in under 30 seconds.

Reversibility: The Swiss Army Knife itself is completely unaffected. All tools remain intact, the chassis stays untouched, and the brass rivets remain unharmed. Original Cellidor scales can be reinstalled, though fit may not be as tight after removal.

What this product does not do:

• Does not replace both scales
• Does not include a toothpick or tweezers slot
• Does not work with Alox models

When to Use the Versa58 Pen Scale

• Sign a receipt, jot a note, or mark a package without reaching for a separate pen
• Build a two-tool keychain with a MagMount: pen and flashlight, pocket-ready
• Add writing capability to your Swiss Army Knife without carrying a standalone pen
• Swap between the Pen Scale and other Versa58 scales depending on the day’s needs
• Give a customized Swiss Army Knife as a practical, personal gift

Warranty and Returns

Backed by Keyport’s one-year limited warranty against manufacturing defects. 30-day returns accepted on new, unused items. See full warranty and return policy.

Build Your Versa58 Setup

The Pen Scale covers one side of your Swiss Army Knife. For a complete two-side upgrade, add a Clip Scale for pocket clip carry and a toothpick slot, or a V Scale for a tweezers slot on the other side.

Want magnetic quick-swap on your knife? Add a MagDock to magnetically attach and detach the Pen Scale without pressing the release arm.

For standalone keychain or desk use without the Swiss Army Knife, pair the Pen Scale with any other Versa58 scale using a MagMount.

Learn More About the Versa58 Modular Platform

The Versa58 Pen Scale is part of the Versa58 system, which unlocks modular upgrades for your 58mm Swiss Army Knife. Swap scales, add tools, and evolve your carry without permanent modification.

Explore the Versa58 modular ecosystem to see how the full system works.

Shop the complete Versa58 collection for 58mm Swiss Army Knives with Cellidor scales.

Read the full guide to the Versa58 modular platform for a deeper look at the system architecture.

Interested in designing your own scales, tools, or accessories? Visit the Versa58 Maker Space for designers, makers, and modders.

Frequently Asked Questions: Versa58 Pen Scale

What is the difference between the aluminum and titanium versions?
Both use the same Troika refill and slide-out mechanism, and both weigh 10g. The titanium version is more scratch-resistant and has a distinct matte finish. The aluminum version delivers the same writing performance at a lower price.

How do I replace the pen refill?
The Pen Scale uses a standard Troika 99Z119 micro ballpoint refill. Slide the pen out, remove the spent refill, and insert a new one. Replacement refills are available from Keyport and Troika retailers.

Can I use this without a Swiss Army Knife?
Yes. Pair the Pen Scale with any other Versa58 scale using a MagMount for standalone keychain, desk, or bag carry.

Does Keyport offer a warranty?
Yes. One-year limited warranty against manufacturing defects. 30-day returns on new, unused items. See the full policy for details.

Disclaimer

We are not affiliated with or endorsed by Victorinox AG. The modular Keyport Versa58 System is a patent-pending platform designed to work independently or to complement compatible 58mm Swiss Army Knives.