Pen Knife – 2.13-Inch Hidden Blade, 5 Color Options

Most people who walk into an office, a college campus, or a crowded parking garage aren’t going to pull a folding knife out of their pocket — and that’s understandable. But going completely unarmed is a different conversation. The Pen Knife gives you a 2.13-inch blade tucked inside something that looks exactly like what it’s sitting next to in the cup on your desk. Nobody looks twice at a pen.

Who This Blade Is For

This one’s for the office worker who can’t clip a folding knife to their belt without someone raising an eyebrow at the front desk. It’s for the college student who wants something in their backpack that won’t get them pulled aside. It’s for the person who keeps a backup in their center console, nightstand drawer, or work bag — someone who understands that a last-resort tool is still better than nothing. If you already carry a primary defense tool like pepper spray or a stun gun, this is the quiet addition that fills the gaps.

Is It the Right Fit for You?

Choose It If You Want

• A discreet blade that passes as an ordinary writing pen
• Something inexpensive enough to keep one in the car, one in the bag, one at the desk
• A lightweight backup that adds no noticeable bulk
• Five color options so it blends naturally with your everyday carry

Consider Another Option If You Need

• A primary self-defense tool — this is a backup, not a replacement
• A longer blade for utility cutting tasks
• A one-handed opening mechanism for quick access under stress

Pen Knife Features and Benefits

• Hidden 2.13-inch blade: Concealed inside the pen body — accessible when you need it, invisible when you don’t
• Fully functional ink cartridge: Writes like a real pen so it never looks suspicious on a desk, in a bag, or in your hand
• Pen cap safety: Keeps the blade securely covered during carry and protects the edge when stored
• 5.38-inch overall length: Slim and pocket-friendly — fits anywhere a standard pen fits
• Five color options: Black, Camo, Gold, Red, and Silver — easy to match your bag, your desk setup, or your preference
• Lightweight construction: No added bulk in a purse, glove box, or drawer
• Included ink cartridge: Ready to use right out of the box as both a pen and a backup blade

How the Pen Knife Compares

Here’s a quick look at how this tool stacks up against two other common options people consider for discreet everyday carry.

	Pen Knife	Folding Pocket Knife	Keychain Pepper Spray
Blade or Key Spec	2.13-in hidden blade	Visible blade, various lengths	Short-range spray deterrent
Size and Carry	Pen-sized; pocket, purse, or desk	Clip to pocket or belt	Clips to keys or bag zipper
Concealment	Looks exactly like a pen	Recognizable as a knife	Recognizable as a spray canister
Best For	Discreet, low-profile backup	Everyday utility and defense	Distance deterrent
Ease of Access	Remove pen cap to deploy	One-hand thumb opening	Point and press

Care and What’s Included

What’s in the Box

• One Pen Knife with hidden blade
• Pen cap
• Installed working ink cartridge

Care and Storage

Keep the pen cap on whenever the blade isn’t in use — it protects both you and the edge. The ink cartridge is a standard replacement type, so when it runs dry, swap it out like you would any everyday pen. Store it wherever a pen would naturally live: a bag pocket, a desk drawer, a car’s center console.

Legal Notes

Disguised knives like the Pen Knife are legal to own in most US states, but knife laws vary significantly by city, county, and venue — especially schools and workplaces. Check your local laws before carrying. Just owning it isn’t enough; knowing where you can and can’t bring it matters.

Pen Knife: Frequently Asked Questions

How long is the blade on the Pen Knife?

The Pen Knife has a 2.13-inch hidden blade with an overall length of 5.38 inches — nearly identical to a standard ballpoint pen. That’s what makes it effective as a discreet carry option. It’s a backup blade, not a utility knife, so the shorter length is by design.

Does the Pen Knife actually write?

Yes — it ships with a real, working ink cartridge already installed. It functions as an ordinary pen until you need the blade. When the ink runs out, replace the cartridge the same way you would with any standard refillable pen. This is what keeps it from looking out of place anywhere you put it.

What colors does it come in?

It’s available in five options: Black, Camo, Gold, Red, and Silver. If you’re keeping one at a desk, Black or Silver blends right in with office supplies. Camo works well for a range bag or vehicle. Pick the one that fits where you’re going to carry it.

Is the Pen Knife legal to carry?

It’s legal in most US states, but disguised-blade laws vary by location — some cities and counties restrict them, and most schools and many workplaces prohibit any knife regardless of type. Before you carry it anywhere, take ten minutes to look up your local knife laws. Don’t assume; verify.

Add This to Your Everyday Carry

At six dollars, there’s no reason to be caught with nothing. Pick your color, toss it in your bag, your car, or your desk drawer, and forget it’s there — until the day you’re glad it is. Add it to your cart and stay a step ahead.