About MRF card

From a single Universal card in 2017 to a 19-product modular EDC ecosystem in 2026 — MRF Tools makes credit-card-sized engineering for engineers, makers, travelers, and anyone who carries their workshop in a wallet.

10 Kickstarter campaigns funded · $238K+ raised · 4,000+ backers worldwide.

Four product categories. One philosophy.

MRF multitool credit cards are CNC-machined precision tools designed around a single constraint: they must fit in a standard wallet slot (85 × 54 mm, 1.5–3 mm thick). Within that constraint, we pack dozens of useful functions — wrenches, rulers, sundials, cutting edges, bit drivers, fire starters, fishing hooks — depending on the mission you choose.

Today the catalog spans 13 multitool cards (Universal series + mission-specific), 3 knives (folding + credit-card blades), 2 pocket tools, and 1 wallet that organizes everything. Each card is machined from solid Grade 5 Titanium or hardened 440C stainless steel, hand-polished, laser-engraved, and shipped from Ukraine.

Supplementing and replacing classic multi-tools

MRF cards complement classic multitools like Leatherman, Victorinox, and SOG — and in many everyday situations replace them. Where a Leatherman gives you 17 tools at 8.5 oz that lives on your belt, the Universal 5.0 gives you 70+ functions at 1 oz that lives in your wallet. For tightening a screw, cutting rope, opening packages, measuring distances, or starting a fire — you don't need pliers. You need a tool that's actually with you when you need it.

And for the engineering-specific functions that no traditional multitool offers — protractors, isometric grids, drill gauges, sundial compasses, distance estimators, drafting circles — MRF cards are the only thing that fits in a wallet.

EDC cards for everyone — Universal series with 60+, 70+ and 80+ tools in 1

The MRF Tools Universal series is the backbone of our catalog — three generations of credit-card multitools that have shipped to thousands of EDC enthusiasts worldwide.

Three generations, one design philosophy:

  • Universal 3.0 — 60+ tools, modular handle system, sundial compass, full Metric & Imperial wrench set. The proven workhorse.
  • Universal 4.0 — 80+ tools, TSA-safe (no blade), engineering instruments (moon-phase calendar, earth parallel meter, distance ruler). The traveler's choice.
  • Universal 5.0 — 70+ tools, dual-blade design merging the best of 3.0 and 4.0, latest engineering. The flagship of 2026.

Who they're for:

  • Mechanics and engineers — full Metric (M3-M17) and Imperial (5/16"-9/16") open-wrench sets, screwdrivers, spoke keys, 1/4" hex bit driver compatible with Leatherman bits
  • Hikers and outdoor enthusiasts — sundial compass, distance estimators, fire-starter scrapers, integrated cutting tools
  • Air travelers — Universal 4.0 is blade-free and certified for hand luggage
  • Cyclists — spoke wrenches (13ga, 14ga, 15ga, 4.3mm), wire benders, cord cutters

Modular system: All three Universal cards accept our Modular Tool KITs — saws, pliers, wrenches, combs that click into the card body. Add a wooden handle and the card converts into a full-grip outdoor tool.

Materials: Grade 5 Aerospace Titanium (28-30g, 35-40 HRC, hypoallergenic) or hardened 440C Stainless Steel (52-58 HRC, maximum edge retention). Both available in natural finish or Black PVD/DLC coating.

Designers, artists, engineers, students — drafting cards that fit a wallet

The Designer and Professional series are built for creative and technical professionals who need precision drafting tools at hand without carrying a backpack.

  • Designer — anodized aluminum (1.5mm), available in black, orange, blue, and red. Includes inch and metric rulers, compass for circles and arcs, and protractor for angles. Lightweight and stylish.
  • Professional — Cerakote™-coated stainless steel (black or dark green) or natural titanium. Adds drill diameter gauge, sheet metal thickness gauge, safe box opener, smartphone stand, and bottle opener.
  • Bit Store Card — for makers who use 1/4" hex bits constantly: 16 bits + 3 dedicated drivers in card form. Compatible with Leatherman flat bits.

These cards are practical, durable, and stylish — a great choice for professionals who appreciate original design combined with functionality. Pair them with the MRF Wallet for a complete drafting EDC.

Outdoors, camping, survival — Adventur, Bushcrafter, Survival Wallet Kit

For preppers, bushcrafters, hikers, fishermen, and hunters — we offer a dedicated outdoor lineup. Each product is a credit-card-sized survival platform built from hardened 440C steel or Grade 5 titanium.

  • Adventur — the world's first credit-card outdoor tool. 440C Black PVD steel hardened to 56-58 HRC (Japanese-blade hardness). 40+ tools, modular handle for real torque, integrated blade. NOT TSA compliant — sharp blades.
  • Bushcrafter — distinctive ferro rod slot for fire-starting, serrated blade for striking sparks, integrated mini-axe profile, and special slots for winding fishing line or fire cord. Built for true wilderness deployment.
  • Survival Wallet Kit — three specialized cards (Fisherman, Hunter, Urban) with 31 removable tools: fishing hooks, lure spoons, arrowheads, sewing needles, tweezers, SIM eject pins. Snap-out design for instant deployment.

For full outdoor EDC, combine with the MRF Fold folding knife and the MRF Wallet as the leather backbone of your kit.

Cyclists, snowboarders, skiers, skaters, scooterists — Extreme

The Extreme from MRF Tools is a heavy-duty multi-tool ecosystem built for action-sport athletes who need to fix gear on the move. Cyclists, snowboarders, skiers, rollerbladers, scooter riders — anyone who deals with bolts, screws, and spokes far from a workshop.

Why Extreme is in a class of its own:

  • Modular Handle System — connects to the card to multiply leverage. Tighten nuts and bolts with real torque, unlike standard flat tools.
  • 1/4" Bit Clip with Lock — locks standard hex bits in place for stable, no-slip screwdriving. Compatible with Bit Store Card for a full bit kit.
  • Special slots for nuts and bolts — only credit-card multitool on the market with integrated nut-tightening slots for hard-to-reach places.
  • 50+ functions — full Metric (6-17mm) and Imperial (5/16"-9/16") wrench sets, spoke wrenches (13ga, 14ga, 15ga, 4.3mm), wire benders, cord cutter, fire-starter scraper.

Materials: Grade 5 Titanium (30g) or Hardened Stainless Steel (50g). Available in Natural Stonewash, Black DLC, or Cerakote finishes.

Designed without a primary blade — flight-friendly, easy to carry on trips and tournaments. For cyclists who also want a blade for trailside repairs, pair Extreme with the MRF Fold.

OfficeWorker — flight-friendly EDC for office, travel, and the city

The OfficeWorker is our 40-in-1 blade-free card tool — purpose-built for those who carry their EDC through airport security, office buildings, and city environments where blades are inconvenient or restricted.

OfficeWorker key features:

  • Staple puller — easily remove staples from reports and documents without bending paper
  • Ruler and compass — both inch and metric scales for drawing, sketching, and measuring
  • Bottle and can opener — handy for snacks and coffee breaks
  • Safe box opener — cuts tape and packages without exposed blade
  • Cord cutter slot — cleanly cuts string and lanyards
  • Smartphone stand — kickstand-style for video calls
  • Bit driver — works with standard 1/4" hex bits for furniture assembly and field repairs

TSA-safe by design: No exposed cutting edge means it travels in any wallet through any security checkpoint. Made from Grade 5 Titanium or hardened stainless steel.

For office workers who also want drafting tools, pair with the Designer or Professional. For makers who carry bits, add the Bit Store Card. All fit in the MRF Wallet.

Lumberjack — beard comb, screwdrivers, and tools for bikers and travelers

The Lumberjack from MRF Tools is designed for those who value style, convenience, and personal-care functionality in their EDC. Made from hardened steel or titanium, it combines grooming tools with practical everyday utility.

Features and functionality:

  • Beard and hair comb — fine teeth for beards and hair, fits in any wallet, always at hand for bikers and bearded men
  • Screwdrivers and wrenches — quick minor repairs and adjustments
  • Bottle opener — for breaks at any time
  • Small blade — sharpening pencils, opening boxes, light cutting tasks

Who it's for: Bikers with beards who want to look groomed on the road, travelers who pack light, women who want a compact comb that doesn't take up purse space, and anyone who appreciates dual-use design.

Pair with the MRF Wallet to organize Lumberjack alongside your other MRF cards.

Knife collectors — MRF Fold, Art Knife, and Card Knife Tattoo

For knife enthusiasts and EDC collectors, MRF offers three distinct cutting-tool lines — from a folding knife with a proprietary lock mechanism to gallery-grade laser-engraved blades.

  • MRF Fold — our folding knife with the proprietary MRF Rotate Lock™ mechanism. Built for daily-carry confidence: no wobble, no accidental closure, smooth deployment. Grade 5 Titanium frame with hardened 440C blade.
  • Art Knife — credit-card knife with CNC openwork patterns. Six distinct designs treating the knife as both a functional tool and a wearable art object. Hardened steel.
  • Card Knife Tattoo — Universal Edition. Laser-engraved tattoo-art designs on 440C steel — 10 different patterns to choose from. The collector's gift.

For collectors: All three fit in the MRF Wallet — the diagonal slot accommodates any MRF card-sized blade, and the elastic band on the back holds the MRF Fold securely.

Note: All cutting blades are NOT TSA-compliant. For air travel, choose OfficeWorker or Universal 4.0 instead.

MRF Wallet — the leather backbone that organizes your entire EDC

The MRF Wallet isn't just an accessory — it's the organizing principle behind the entire MRF catalog. Every card-sized tool, every pocket tool, every knife is designed to fit.

How it works:

  • Diagonal front slot — fits any MRF credit-card multitool: Universal 3.0, 4.0, 5.0, OfficeWorker, Extreme, Bushcrafter, and any other MRF card
  • Elastic tool band on the back — secures up to 2 pocket tools or the MRF Fold folding knife
  • 4-6 standard cards plus cash — full wallet functionality, not a compromise
  • Snap closure — single button keeps everything secure

Pre-built loadouts:

  • Travel: Universal 4.0 + OfficeWorker + MRF Wallet
  • Office: OfficeWorker + Designer + Bit Store Card
  • Outdoor: Adventur + Bushcrafter + MRF Fold + Survival Wallet Kit
  • Engineering: Professional + Designer + Bit Store Card + Extreme
  • Knife collector: MRF Fold + Art Knife + Card Knife Tattoo

Materials: Premium full-grain leather, hand-stitched, with reinforced diagonal slot. Built to develop a personal patina over years of carry.

Bit Store Card and Modular Tool KITs — for makers who carry bits

For makers, repair technicians, IT pros, and anyone who uses 1/4" hex bits constantly — MRF offers two complementary platforms.

  • Bit Store Card — credit-card-sized bit holder carrying 16 standard bits + 3 dedicated drivers (small, medium, large). Compatible with Leatherman flat bits and any standard 1/4" hex bits. Snap-out design — bits release cleanly when needed.
  • Modular Tool KITs — interchangeable inserts that click into any Universal 3.0, 4.0, or 5.0 body. Available KITs: saw blade, file, scissors, comb, additional wrenches. Customize the loadout for your specific mission.

Use cases:

  • IT pros — full bit kit at the ready for laptops, servers, drone repair
  • Furniture and home repair — Allen, Phillips, Torx all in card form
  • Field engineers — replacement bits without carrying a full toolbox
  • Bike mechanics — pair with Extreme for full bicycle service capability

Both fit in the MRF Wallet.

Air travelers — 6 TSA-safe MRF cards that fly with you

Frequent flyers and business travelers — these six MRF cards pass airport security in any country with no exposed cutting edges. Pack them in your carry-on wallet and forget about TSA confiscation.

TSA-safe lineup — all blade-free:

  • Universal 4.0 — 80+ tools without a blade. Engineering instruments (sundial, distance ruler, moon-phase calendar) make this the most loaded TSA-friendly card on the market.
  • OfficeWorker — 40-in-1 purpose-built for travel and office. Cord cutter and safe box opener handle everyday cutting tasks without a blade.
  • Extreme — heavy-duty 50+ tools, modular handle for real torque. Designed without primary blade so cyclists and skiers can fix gear at any destination.
  • Designer — drafting tools (rulers, compass, protractor) on lightweight anodized aluminum. No blade.
  • Professional — adds drill gauges and smartphone stand. Safe box opener with no exposed edge.
  • Bit Store Card — 16 bits + 3 drivers. Pure screwdriving, no cutting tools. TSA never blinks.

NOT TSA-compliant — leave at home or pack in checked baggage: Universal 3.0, Universal 5.0, Adventur, Bushcrafter, Lumberjack, MRF Fold, Art Knife, Card Knife Tattoo, Survival Wallet Kit (fishing hooks may trigger additional screening).

Pro tip for travelers: pack a TSA-safe card (e.g. Universal 4.0 or OfficeWorker) in your MRF Wallet for daily flying, and keep a knife card (e.g. MRF Fold or Adventur) in your checked baggage or destination kit.

Gift guide — which MRF card for which person?

MRF cards make memorable gifts because they're functional and they fit in a card envelope. Pick by the recipient:

Corporate gifting: we engrave logos and names. See Corporate Gifting for bulk orders.

Tools for drawing and measuring
  • Ruler (inch and metric)

A simple, handy ruler for measuring in inches and centimeters, suitable for everyday tasks. Designers, engineers, and students can use it to create sketches or drawings, and hikers can use it to measure on a map. It is always with you, making it available at any time for quick measurements.

  • Compass (inch and metric)
    A compact compass that allows you to draw circles and arcs is useful for those who work with technical drawings or modeling. For example, an engineer can easily take measurements for a sketch, and a student can complete practical geometry assignments. A compass is always available, even if other drawing tools are left at home. Classic multitools usually do not have this feature, so the card is a valuable addition to them.

  • Protractor and precision protractor to 1/3 degree

A tool for measuring angles, useful for drawings and installation work. The protractor will help you determine the angle of inclination when working with shelves or architectural elements, and the precision protractor will come in handy for precise measurements when working with small mechanisms or modeling. In emergency situations, such as the construction of a temporary shelter, the protractor will help determine the optimal angles for structural stability. Thanks to its compactness in the card, the protractor is always at hand for precise measurements.

  • Precision ruler (0.5 mm, 1/32 inch)

An ideal tool for high-precision measurements, useful for jewelry work or electronics repair. Craftsmen working with microcircuits or small mechanisms can easily use this ruler for adjustments. The high precision of the ruler ensures maximum detail without additional tools.

Gauges and templates
  • Tire tread depth gauge
    A tool for monitoring the condition of tires that helps determine the level of tire wear before driving. This is important for drivers who travel frequently, allowing them to quickly assess whether their tires are safe for long journeys. In bad weather or before an important departure, this gauge ensures that you are ready to go.

  • Guitar string height gauge
    A special tool for fine-tuning your guitar, allowing you to adjust the string height for optimal sound. Useful for musicians on tour or rehearsing, it allows you to quickly set up your instrument. It is important in situations where sound quality matters and you don't have time for professional tuning.

  • Drill Diameter and Steel Sheet Thickness Meter. A tool for determining the diameter of drills or the thickness of metal sheets, useful in workshops or for home repairs. It saves time and increases accuracy, especially when working with metal or selecting a drill bit. When preparing or adjusting machinery, this gauge ensures optimal use of materials. It is useful for builders and engineers to assess the strength of a material. For example, when assembling structures, you can quickly check whether the steel thickness meets safety requirements.

  • Blade angle gauge
    Helps determine the angle of sharpening of blades, which is useful for those who frequently work with blades or cutting tool. It helps maintain optimal sharpness, which is important for efficient tool use. Maintaining the right sharpening angle can ensure that your blade is as effective as possible in the field or at home.

Blades and cutting tools
  • Cut tool
    A compact blade for cutting ropes, fabrics, or food. For example, while hiking, you can cut food or prepare ropes for your tent. In emergency situations, such as first aid, the blade can help cut clothes or make a bandage. our card adds an extra layer of accessibility, especially when the main tool is not available.
  • Outdoor tool
    A miniature woodworking tool useful for collecting firewood or building a shelter. For example, you can quickly chop branches for a fire. In an emergency situation, when you need to quickly build a shelter, an ax will help you complete the task. This is an addition to the classic multi-tool, which usually does not have an ax function.
  • Cord cutter
    A tool for quickly cutting belts or slings, which can save lives in the event of an accident. It is used to cut seat belts or other restraints when quick access is important for release. Suitable for emergency situations where safety is a priority.
  • Serrated blade
    A serrated blade for efficiently cutting through fibrous materials such as ropes, straps, or lanyards. Useful in hiking or survival situations where a strong and reliable cut is required. In emergency situations, a paring cut tool can help cut through rough materials, providing quick access to the right items.

Box,Can, Bottle Openers
  • Bottle opener

A handy tool for opening bottles that will come in handy during picnics or outings. The bottle opener allows you to quickly open a drink without looking for an additional tool. This is a classic solution for situations when you need to take a break and refresh yourself with a drink.

  • Can opener

A compact tool for opening canned food, especially useful for hiking or survival situations. It provides quick access to food, which is convenient for camping or hiking when a regular can opener is not available. In emergency situations, when food is a resource for survival, this can opener will become indispensable.

  • Box opener

A blade for quickly opening packages or boxes, which is convenient for the office or home. It helps to open the package without damaging the contents, which is important for receiving goods or equipment. Whether at work or at home, the box opener provides easy and precise access to the contents.

Tools for survival
  • Shovel

Compact tool designed for essential digging tasks. Its minimalist design fits seamlessly into a credit card-sized format, making it easy to carry in a wallet or pocket. Ideal for quick jobs like loosening soil or clearing small areas, it can also be a lifesaver in emergencies situations, where digging a small hole or trench may be necessary.
Made from durable materials, this spade withstands harsh conditions, making it reliable for survival and camping needs.

  • Fire starter

Creates a spark to start a fire for heating or cooking. Useful for hiking or camping, especially in conditions where humidity does not allow the use of conventional lighters. In an emergency, the fire starter provides an opportunity to create a heat source or signal for help.

  • Sundial and compass

A primitive but reliable tool for determining time and direction, which is useful for tourists or survival in the wild. It will help you navigate when you don't have modern navigation tools. For example, you can plot a route or estimate the time until sunset. In emergency situations, when electronics fail, these tools become critical.

  • Distance ruler

Helps you estimate the distance to objects in nature or while traveling. It's useful when hunting, fishing, or navigating the terrain when you need to estimate the distance to an object or landmark. For example, you can determine whether your SOS signal will reach rescuers. The rangefinder will help you make informed decisions in the field, especially if it is important to stay at a safe distance or have an accurate estimate of the distance.

  • Latitude measurement by the North Star

A tool for astronomically determining your location by the North Star, useful when traveling in remote locations. For example, in the desert or at sea, this method will help you navigate without electronic devices. In an emergency, when all other navigation aids are unavailable, this method may be the only way to keep your direction.

  • Moon phase calendar

A useful tool for determining the phases of the moon, which is especially important for planning an overnight stay or fishing trip. For example, it will help you choose the best time for outdoor activities, taking into account the level of light and visibility at night. In the field, knowing the phases of the moon helps you better plan your actions in the dark.

  • Hooks and jigs for fishing

Allows you to use the card as an improvised fishing gear in survival conditions. This provides an opportunity to get food in the wild or during long hikes. In the absence of food supplies, these tools can become a source of life-sustaining food.

Tools for the workshop and equipment
  • Wrench set
    Useful for basic repair tasks, such as tightening nuts on a bike or vehicle. It allows you to make quick adjustments without having to carry heavy tools. Suitable for minor repairs and adjustments in the field.
  • Spoke wrench set
    Designed for adjusting the tension of the spokes on a bicycle, which is especially important during long journeys. For example, it is useful in case of wheel deformation when you need to quickly adjust the spoke tension. This helps to avoid more serious damage and keep you traveling.
  • Hex key set
    Used to work with screws with an internal hexagon, which is common in furniture and appliances. It will come in handy when adjusting parts or repairing sports equipment. It is suitable for quick and easy adjustments, providing the necessary flexibility in work.
  • Screwdrivers (flat and Phillips)
    These screwdrivers allow you to tighten and loosen screws for simple repairs at home or on the go. For example, you can use them to replace batteries in devices or repair household items. Their compact size makes them easy to use in normal situations, although the card-shaped access restrictions can be a challenge in hard-to-reach areas.
  • Bit driver with lock
    Universal bit holder for standard 1/4, 4 mm, 1/8 Leatherman bits, allowing you to quickly change bits for different applications. Convenient for a wide range of jobs with the ability to quickly change the bit for a specific screw. Suitable for a variety of tasks at home and provides flexibility when repairing appliances or furniture.
  • Nail puller and pry bar
    Help to remove nails and pry objects, which is useful when dismantling or repairing. For example, when disassembling old structures or opening a jammed door. In cases where you need to clear a path or gain access to hidden objects, the nail gun and crowbar provide convenient use.
  • Wire stripper and wire bending holes
    Ideal for removing insulation and working with electrical wiring, which is useful when installing lighting or repairing electrical wiring. It is used as a basic tool for wiring at home or in the field. It is suitable for setting up or making quick electrical repairs, providing the necessary flexibility in working with wires.
  • Tweezers
    A small but useful tool for removing small objects or for medical manipulations such as removing splinters. It provides convenience in first aid or working with small parts. The compact tweezers are convenient for use in the home and outdoors.

  • SIM card ejector tool
    Easily removes SIM cards, which is convenient for travelers or when changing operators. It is useful for quick access to the SIM card when you need to change it for communication. In case of an emergency, this tool allows you to quickly install a new SIM card to communicate with important contacts.

Material and size

MRF cards are made of 440C hardened steel (hardness 45-55 HRC) or Grade 5 titanium (hardness 35-38 HRC), which ensures their strength and durability. The cards are 55x85 mm in size and 1.5 to 3 mm thick, which makes them easy to carry in a wallet.

Designer model made of 1.5 mm thick anodized aluminum.

Fisherman, Urban and Hunter made of 304 steel with a thickness of 0.8 mm.

Colors and coatings

MRF cards are available in different colors and coatings depending on the model. The Designer series cards are made of anodized aluminum and are available in black, blue, orange, red, and yellow, which gives them a stylish look and personality.
All other cards are made of natural brushed steel or brushed titanium, which emphasizes their durability and reliability.
In addition, steel cards can be coated with Cerakote to increase resistance to external influences. These models are available in black, dark green, or orange, allowing you to choose the option depending on your preferences.

Card extensions, accessories, and the MRF Wallet

MRF offers a complete ecosystem of accessories that organize and extend the functionality of every multitool card.

MRF Wallet — the leather backbone: a modular cardholder with a diagonal front slot that fits any MRF credit-card multitool, an elastic band on the back for the MRF Fold folding knife or pocket tools, plus space for 4-6 standard cards and cash. One snap closure organizes your entire EDC.

Modular handles for outdoor use: Adventur, Universal 3.0, and Extreme all accept screw-in or pin-lock handles that convert the card into a high-torque or full-grip outdoor tool.

Modular Tool KITs: interchangeable tool inserts (saws, files, scissors, combs, additional wrenches) that click into any Universal 3.0, 4.0, or 5.0 body. Each user customizes the loadout for their specific mission — workshop, outdoors, drafting, or grooming.

Bit Store Card: for makers who use 1/4" hex bits constantly — 16 bits + 3 dedicated drivers in card form, compatible with Leatherman flat bits.

These accessories enhance the user experience, making MRF cards versatile, personalized, and ready for any task.

Cerakote paint

Cerakote TM is a special ceramic coating that is known for its high wear resistance and premium quality. This coating is widely used in the customization of weapons and expensive multi-tools due to its unique properties that provide high resistance to scratches, corrosion, and wear. Cerakote also adds not only increased durability to the tools, but also an aesthetic appearance with a choice of different colors.
MRF uses Cerakote coating for its steel cards, which increases their durability and protection against external influences. As a result, customers receive a premium product that combines functionality with a high level of protection and elegance.


MRF.Tools is a brand created in 2015 by MRF.Engineering, a Ukrainian engineering company. Our products are designed and manufactured at our facility in Ukraine. International sales and payment processing are handled by LaVend sp. z o.o. (Poland)

We create credit card multitools and EDC keychains. Our mission is to provide premium gear to the modern explorer. We believe that your everyday gear should be functional and minimal. We're here to design quality products that will last you for a long time.

Since 2010 MRF.Engineering has been engaged in development of various plug-and-produce equipment (general mechanical engineering, automated systems, vending and automatic selling machines, etc.) Our team consists from skilled design engineers (mechanics, technologists, electronics engineers and electricians).

Lumberjack with leather wallet — pocket EDC — Designed in Ukraine
Adventur black steel variant — outdoor EDC — Designed in Ukraine