Credit Card Knife – 2.75″ Blade, Blade Lock, Wallet Size

You’ve been there — digging through a bag, checking every pocket, patting yourself down — because you need something sharp and there’s nothing. A box to open, a zip tie to cut, a stubborn piece of tape. The Credit Card Knife exists for exactly that moment. It folds flat to the size of a credit card, lives in your wallet, and weighs next to nothing. You forget it’s there until you need it — and then you’re glad you have it.

Who This Knife Is For

This isn’t for the person who already carries a folder clipped to their jeans every day. It’s for the person who won’t — because a pocket knife feels like too much, prints through lighter pants, or just isn’t worth the hassle for someone who mostly needs to open packages. It’s also a natural fit for delivery drivers breaking down boxes on a route, parents who need a blade in the car or junk drawer but don’t want anything bulky, people building a go-bag or glovebox kit, and anyone who wants a flat, forgettable backup that’s always with them as long as their wallet is.

Is It the Right Fit for You?

Choose It If You Want

• A blade you’ll actually carry every day without thinking about it
• Something that fits in a wallet slot alongside your cards
• A true backup knife for light utility at a price that makes it easy to keep one in multiple places
• Zero-bulk carry with a real locking blade

Consider Another Option If You Need

• A heavier-duty blade for sustained cutting or outdoor use — consider a full-size folding knife
• Multiple tools in one package — a multi-tool would serve you better
• A longer reach or a fixed blade for field or tactical use

Credit Card Knife Features and Benefits

• 2.75-Inch Stainless Steel Blade: Enough edge for tape, cord, packaging, and everyday utility tasks without adding any real size to what you carry.
• Blade Lock Mechanism: Keeps the blade extended while you’re using it so it stays put and won’t fold back unexpectedly mid-cut.
• Credit Card Form Factor: At 3.38″ x 2.13″ and just 0.13″ thin, it slides into a standard wallet slot and stays flat — you won’t feel it there.
• Ultra-Lightweight Build: Comes in at 0.1 lbs. It adds nothing meaningful to your wallet or bag.
• Disguised Design: Looks like a card. No one’s going to glance at your wallet and notice a knife.
• Ready to Use Out of the Box: No assembly, no setup — fold it flat, slide it in, and it’s ready when you are.

How the Credit Card Knife Compares

Here’s how this knife stacks up against two common alternatives shoppers consider alongside it.

Care and What’s Included

What’s in the Box

The Credit Card Knife arrives folded flat and ready to slide into a wallet slot — no tools or assembly required.

Care

Keep the blade dry and wipe it down after use to prevent corrosion. The stainless steel blade holds up well to everyday utility tasks, but like any small blade, a little basic maintenance goes a long way toward keeping it in good shape.

Legal Notes

This knife is legal to own and carry in most US states, but blade length and folding knife rules vary by state, city, and venue. Some workplaces, schools, and public buildings also have their own restrictions. Check your local laws before carrying it anywhere that might have specific rules.

Credit Card Knife: Frequently Asked Questions

What can the Credit Card Knife actually handle?

It’s built for everyday light utility — opening boxes, cutting tape, slicing cord, trimming packaging. It’s a backup blade, not a replacement for a heavier folder if you’re doing sustained cutting or outdoor work. For routine daily tasks, it does the job cleanly and reliably.

Does the blade lock hold while you’re using it?

Yes. The blade lock keeps it extended during use so it won’t fold back on your fingers mid-cut. When you’re done, you fold it back down and it returns to card size. It’s a simple mechanism that works the way you’d expect it to.

How thin is the Credit Card Knife — will it actually fit in a wallet?

At 0.13 inches thick and 3.38″ x 2.13″ folded, it fits in a standard wallet card slot. It’s designed to sit alongside your cards without creating a noticeable bulge. Most people who carry it say they forget it’s there.

Is the Credit Card Knife a good choice for a go-bag or glovebox?

It’s a natural fit for both. At this size and price, it’s easy to keep one in your glovebox, go-bag, desk drawer, or travel bag as a dedicated backup. Because it takes up no meaningful space, there’s no real downside to having one in each place you’d want a blade available.

Add a Backup Blade to Your Everyday Carry

At this size, weight, and price point, there’s no reason to be without a blade when you need one. Slide the Credit Card Knife into an open wallet slot and it’ll be there the next time you need to cut something and don’t have a better option handy. Add it to your cart now.