Two credit-card tools from MRF, a small maker in Mykolaiv, Ukraine, sit at opposite ends of what a wallet card can be. One is the Adventur, a survival card built around a live blade and a chopping edge. The other, the Extreme 3.0, skips the blade completely and builds around a locking quarter-inch bit driver. Same wallet slot, opposite religions. Both are milled from titanium or 440C steel, not stamped from sheet.
Same slot in your wallet. Completely different jobs.
Prices start at $44 for the Adventur and $43 for the Extreme at MRF’s own store, with titanium builds climbing to $95. MRF designs, tests, and finishes every card at its own bench in Mykolaiv, a run that goes back to 2015.
The Adventur is the one with teeth
Start with the edge, because the edge is the pitch. A chopping edge runs down one side of the 85 by 54 mm card, and beside it sits a live cutting blade plus a cord cutter for paracord and webbing. Around those, MRF packs metric and imperial open wrenches, flat and Phillips drivers, and an etched protractor scale, and the company counts more than 40 functions across the face. Nothing here folds or hides.
A steel arrowhead rides seated in a cutout at the card’s center on the Standard and Full Kit editions, then slides free when you want a point. Lash the card to a stick and it turns into a spear tip or a light hatchet, or slot it into the Full Kit’s handle and swing it like one, which is exactly how MRF’s own field photos show the card working. It isn’t decoration, either.
Editions stack upward. Lite is the card alone at $44 in steel. Standard adds the arrowhead, and the Full Kit adds a locking modular handle, topping out at $95 in titanium Gold and Black.
Titanium drops the card to 39 g and shrugs off rust and magnets alike. For an ultralight carry, nothing else on the card competes with that number, and grams saved here are grams you can spend on water.
Steel answers with the edge. The 440C card runs 56 to 58 HRC, the range MRF notes matches premium Japanese blades, and it comes in raw silver or a black PVD coat over the same layout. Pick steel when the card will chop and baton more than it will ride in a front pocket.
Carry rules change around a live edge, though. MRF states it flatly: the Adventur isn’t TSA compliant, and the company recommends its leather pouch for pocket carry because the edge stays exposed in a wallet slot where a bare edge can chew a card sleeve and surprise a hand. Treat the Adventur as a pouch or backpack card, the tool that rides along on trips into the woods, and its limits stop looking like flaws on every single trip.
Price: $49.95
Where to buy: Amazon and MRF.tools
The Extreme 3.0 leaves the blade out and brings the workshop
Everything the Adventur does with an edge, the Extreme answers with torque. The card runs 85 by 55 by 3 mm, and MRF counts 50 functions, led by a 1/4-inch hex bit driver with a locking bit clip that keeps bits from wobbling mid-turn. Bits aren’t included, and that’s fine, because the driver takes the standard hex bits already rolling around your desk drawer.
Dedicated slots grip nuts and bolts so hardware can’t spin inside the card, a trick MRF says no other card tool offers. The modular handle comes in the box here, too.
Wrenches run 6 to 17 mm in metric and 5/16 to 9/16 in imperial. Spoke wrenches cover 13, 14, and 15 gauge plus 4.3 mm, so the card can true a wheel at the trailhead. Two flat drivers, a Phillips, and micro hex drivers in M4, M5, and M6 handle screws, while wire benders, a pry bar, a fire-starter scraper, bottle and can openers, and rulers in both systems round out the face.
Titanium weighs 30 g at 39 to 40 HRC, in raw stonewash or black DLC.
Hardened 440C steel weighs 50 g and runs harder, at 47 to 49 HRC. Steel starts at $43 against $55 for titanium, and Full Kits top out at $72. In a bike bag, fifty grams disappears fast.
A recessed cord cutter does the cutting, so MRF rates the card TSA-safe and it never leaves your wallet at the airport.
Price: $39.95
Where to buy: Amazon and MRF.tools
The two cards side by side
| Adventur | Extreme 3.0 | |
|---|---|---|
| Blade | Live blade and chopping edge | None, recessed cord cutter |
| Function count (MRF’s tally) | 40+ | 50 |
| Size | 85 x 54 mm, about 2 mm thick | 85 x 55 x 3 mm |
| Weight, titanium | 39 g | 30 g |
| Weight, steel | Not published | 50 g |
| Materials | Grade 5 titanium or 440C steel | Grade 5 titanium or 440C steel |
| Modular handle | Full Kit add-on | Included with Standard |
| Flight-safe | No | Yes, per MRF |
| Price from | $44 at MRF, $49.95 at Amazon | $43 at MRF, $39.95 at Amazon |
Which one belongs in your wallet
Mine splits by where the card sleeps. The Extreme 3.0 can live in an actual wallet, ride through airport security, and true a wheel at the trailhead. In steel at $39.95 from Amazon, it’s the cheaper first card to try, and it isn’t close.
For the trail, I’d take the Adventur and keep it in its leather pouch inside my backpack. You’re paying for the edge, the arrowhead, and the hatchet trick, and that ceiling runs higher than any bit driver, every time.
Wallet or pouch. That’s the whole decision.
