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Plastic Brush Knife – Disguised 4-Inch ABS Blade Hidden in Hair Brush, Glass Breaker Tip, 6.25-Inch Overall, Black, Pink, or Purple

SKU: PBK
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Original price was: $12.75.Current price is: $10.84.

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A fully functional hair brush that separates into a knife. The blade is 4 inches of ABS plastic, so it won't set off a metal detector but still has enough edge to matter. The handle end doubles as a glass breaker. Available in black, pink, and purple. It looks like something you'd toss in a gym bag — and that's exactly the point.

  • Disguised 4-inch ABS plastic blade hidden inside a working hair brush
  • Glass breaker / skull crusher tip built into the handle end
  • 6.25 inches overall — reasonable size for grip and utility
  • ABS plastic construction — lightweight and non-metallic
  • Available in black, pink, and purple

Looks Like a Brush. That’s the Whole Point.

Here’s the deal — nobody thinks twice about a hair brush. It sits in a purse, a gym bag, a desk drawer, a car console. It’s invisible. This one happens to separate into a knife with a 4-inch ABS plastic blade and a glass breaker tip on the handle. The brush itself is functional — it actually works as a brush. Everything about it is designed to be overlooked until the moment you need it to be noticed.

Who This Brush Knife Is For

This is for someone who wants a discreet personal safety option that doesn’t look like a weapon. You carry a purse or gym bag and want something inside it that nobody would question. You work late shifts and walk to your car alone. You want a backup option that’s already hiding in your everyday stuff. The plastic construction means it won’t trigger metal detectors, which makes it different from the comb knife or pen knife. Available in three colors, so it can match whatever you’re carrying.

Is This the Right Choice for You?

Choose the Brush Knife if you want:

  • The most discreet disguised blade option — looks like a basic hair brush
  • Non-metallic ABS plastic that won’t set off metal detectors
  • A built-in glass breaker for emergency situations

Consider something else if you need:

  • A steel blade for serious cutting tasks (ABS plastic has limits)
  • Something smaller (the pen knife or credit card knife take up less space)

ABS Plastic — Limitations and Advantages

Let’s be honest about the material. ABS plastic is not steel. It won’t hold an edge as long, it’s not as strong, and you can’t sharpen it the way you’d sharpen a metal blade. But it has two advantages steel doesn’t — it’s non-metallic, and it’s lightweight. The non-metallic part matters if you need something that won’t set off a metal detector. The lightweight part means the whole brush weighs next to nothing in your bag.

The 4-inch blade is long enough to be functional for light tasks and personal safety situations. The glass breaker tip on the handle end — sometimes called a skull crusher — gives you an additional tool for emergency situations, like breaking a car window if you’re trapped. It’s a dual-purpose design that packs more capability into a simple-looking hair brush than most people would expect.

Quick Comparison: How Does a Self-Defense Knife Stack Up?

Feature Self-Defense Knife Pepper Spray Stun Gun Personal Alarm
Everyday Utility Cutting tool + defense ✓ Defense only Defense + flashlight Defense only
Range Arm’s reach 8-12 feet ✓ Contact only Audible range
No Batteries/Refills Always ready ✓ Expires Needs charging Needs batteries
Legal Carry Varies by state/blade length Most states ✓ Most states ✓ Legal everywhere ✓
Best For Utility + last-resort defense Distance defense Close encounters Drawing attention

Practical Details

Overall length is 6.25 inches. Blade length is 4 inches. ABS plastic construction throughout — handle and blade. The brush portion has real bristles and functions as an actual hair brush. Available in black, pink, and purple. Disguised knives are subject to specific regulations in some jurisdictions, so check your local laws before carrying.

Just a hair brush — unless you need it to be something else. Pick your color.

Frequently Asked Questions

Does the brush actually work for hair?

Yes. It’s a functional hair brush with real bristles. It won’t win any styling awards, but it works. That’s what makes the disguise effective — it does the thing it’s pretending to be.

How durable is the ABS plastic blade?

ABS plastic is tough for a polymer — it’s the same material used in hard-shell luggage and safety helmets. The blade will handle light defensive use and basic cutting, but it won’t hold up to the kind of abuse a steel blade can take. It’s a trade-off for the non-metallic advantage.

Can I re-sharpen the blade?

You can touch up the edge with fine sandpaper, but ABS plastic doesn’t hold an edge like steel. For the price of this item, replacing the whole unit is usually more practical than trying to maintain the blade.

Type of KnifeDisguised
Overall Length6.25 inches
Blade Length4 inches
MaterialABS Plastic
Handle MaterialABS Plastic
IncludedGlass Breaker / Skull Crusher

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