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A pen knife in this collection is a pen-shaped concealed knife, a compact blade hidden inside what looks like an everyday writing pen, not a traditional folding pocketknife. Most models here are fully functional pens as well, so the tool you carry for notes can also handle small cutting jobs and serve as a discreet personal safety option.
The Home Security Superstore carries pen knives in finishes like black, gold, and silver, so the tool blends in with the pens already in your pocket, purse, or bag. Availability in this collection changes, so check individual product pages for current stock.
What Is a Pen Knife?
A pen knife combines a working pen and a concealed blade in a single slim body. Unlike a folding pocketknife, which is clearly a knife when you see it, a pen knife looks like an ordinary pen until the blade is deployed by unscrewing the casing, sliding it apart, or pressing a button on automatic models. That low profile is the whole point: it rides in a pocket, purse, or bag without drawing attention, and it is there when you need a cutting tool or a last-resort personal safety option.
Types of Pen Knives
There are several types of pen knives available including:
1 Stainless Steel Pen Knives
Stainless steel pen knives with serrated or smooth blades for everyday cutting and slicing tasks.
2 Multi-Tool Pen Knives
Pen knives with additional tools like a glass breaker or stylus built into a tactical pen body.
3 Automatic OTF Pen Knives
Automatic OTF (out-the-front) pen knives that deploy the blade at the push of a button.
Tactical Pen Knives
Tactical pen knives are built with personal safety and survival situations in mind. They typically have sturdy construction and may include additional features such as a glass breaker or stylus. They carry easily in a pocket, purse, or bag for discreet everyday use.
How to Choose a Pen Knife
The right model depends on how you intend to use it and your preferences for blade type, added tools, and opening mechanism:
- Blade type: Smooth edges handle clean slicing; serrated edges bite into rope, straps, and tougher material.
- Deployment: Screw-apart and slide casings are simple and widely legal; push-button OTF deployment is faster but more regulated.
- Size: Blades in this category are compact, typically around two inches, sized for utility tasks rather than heavy work.
- Added tools: A glass breaker or stylus adds emergency and everyday function without changing the pen form factor.
- Finish: Black, gold, and silver options help the knife pass as one of your regular pens.
Match the Pen Knife to the Job
For basic cutting and everyday carry, a standard stainless steel pen knife is a solid choice. If you want emergency features, look at a multi-tool tactical pen knife with a glass breaker or stylus. If fast one-handed access matters most and it is permitted where you live, consider an automatic OTF pen knife.
Pen Knife Carry and Legal Considerations
Check your laws first. Concealed and automatic knife rules vary widely by state and locality, and they change. Before you buy or carry a pen knife, review your current state and local laws on concealed blades, blade length limits, and automatic (OTF) knives. Nothing on this page is legal advice.
Because a pen knife conceals its blade by design, it is more likely than an ordinary pocketknife to fall under concealed-carry rules where you live. Automatic OTF models may face additional restrictions in some states. Beyond legality, responsible ownership matters: get familiar with your knife through practice at home, handle and store it safely away from children, and treat it as a last resort. Avoiding and de-escalating a confrontation is always the better outcome; no tool can guarantee your safety.
Pen Knife FAQs
What is a pen knife?
A pen knife is a pen-shaped tool with a concealed blade inside, not a traditional folding pocketknife. Most models also work as real pens, so one slim tool covers writing, everyday cutting tasks, and discreet personal safety carry.
Are pen knives legal to carry?
It depends on where you live. Concealed blade and automatic knife laws vary by state and locality, and some areas restrict blade length, concealed carry, or OTF mechanisms. Check your current state and local laws before buying or carrying one.
How do I choose a pen knife?
Compare blade type (smooth or serrated), deployment (screw-apart, slide, or push-button OTF), overall size, and added tools like a glass breaker or stylus. A basic stainless steel pen knife suits most everyday needs; multi-tool and OTF models add features where they are legal to carry.