Universal 4.0 | 80-in-1 Card Multitool | Titanium & 440C Steel

The Most Functional Card Multitool in the World

The Universal 4.0 is the flagship of the MRF wallet multitool line: 80+ professional-grade tools in the footprint of a standard credit card. Born from years of engineering and feedback from thousands of backers, it turns your wallet into a mobile workshop — ready for everything from urban repairs to the wilderness.

TSA-Safe by Design

The Universal 4.0 base card is completely bladeless, making it TSA-safe and flight-friendly — carry all 80+ tools through airport security in your wallet. Need a blade on the ground? Click in the optional Cut Tool insert, then remove it before you fly. One card covers both travel and everyday cutting.

Quick Specs

Spec	Titanium (Grade 5)	440C Stainless Steel
Built-in tools	80+	80+
Weight	28 g / 1.3 oz	heavier, high-torque
Hardness	35–37 HRC	52–54 HRC (heat-treated 1050 °C)
Size	Credit-card footprint (85 × 54 mm), ~2 mm thick	Same
Finish	Natural / Black PVD	Raw / Black Cerakote
Flight-safe / TSA	Yes — bladeless base	Yes — bladeless base
Modular kit slot	Yes (3.0/4.0/5.0)	Yes
Best for	Everyday carry, weight-critical	Heavy-duty, high-torque

80+ Tools & Unique Functions

• 🪛 A complete mechanic's kit — flat & Phillips screwdrivers, spoke keys
• 🔩 Open wrenches in Metric & Imperial
• 📐 Drawing tools — ruler, protractor and compass for perfect circles
• 🍾 Bottle opener and can opener
• ☀️ Sundial & compass — navigate by the sun in both hemispheres, no batteries
• 🌙 Moon-phase calendar — unique to MRF
• 📏 Earth-parallel meter & distance ruler for precise on-the-go measurement

Choose Your Material

Aerospace Titanium (Grade 5) — the EDC choice: just 28 g, rust-proof, non-magnetic, hypoallergenic, 35–37 HRC. Natural or stealth Black PVD.
Hardened 440C Stainless Steel — the heavy-duty choice: heat-treated at 1050 °C to 52–54 HRC for maximum edge retention and high-torque work. Raw or Black Cerakote.

Next-Gen Modularity

The 4.0 features the MRF Modular System — safely insert and swap click-in Tool KITs (saws, combs, pliers, extra wrenches) to customise your loadout. Kits lock with red o-rings and swap in seconds. The slot is shared across the 3.0, 4.0 and 5.0.

The Cut Tool

The optional Cut Tool is a single insert with several blade-shape designs to choose from — it turns the bladeless 4.0 into a cutting tool when you need it, then comes out for flights.

Manufacturing Excellence

Every Universal 4.0 is laser-engraved (markings never fade), hand-polished for smooth edges, and tested for hardness and tolerances before it leaves the factory.

How to Use Your Universal 4.0

Each card ships with a picture manual covering all 80+ functions. Carry the bladeless base through airport security; on the ground, click the Cut Tool into the universal slot for cutting. The sundial and dual-hemisphere compass need no batteries — align the card to the sun to read approximate time and direction anywhere on earth.

Frequently Asked Questions

Is the Universal 4.0 TSA-safe for flights?
Yes. The base card is completely bladeless and flight-friendly, so all 80+ tools travel through airport security. The optional Cut Tool adds a blade for ground use — remove it before flying.

Titanium or 440C steel — which should I pick?
Pick titanium for the lightest everyday-carry card (28 g, rust-proof, non-magnetic). Pick 440C steel for maximum hardness and edge retention for heavy, high-torque use.

What's the difference between the 3.0 and 4.0?
The 4.0 is the top generation: 80+ tools (vs 60+ on the 3.0) plus unique navigation features like the earth-parallel meter and moon-phase calendar.

What do Base, Tool Kit and Full Set include?
Base is the card itself. Tool Kit adds modular insert kits. Full Set is the complete loadout with all kits.

Is it compatible with other MRF kits and cards?
Yes. The modular slot is shared across the Universal 3.0, 4.0 and 5.0, and works with all MRF Tool KITs.

Where is it made?
Every Universal 4.0 is designed and CNC-machined in Ukraine, then laser-engraved and hand-polished.

---