Hair Brush Knife

This looks exactly like an ordinary hair brush — until you pull it apart. Inside is a 4.25-inch blade made from hard ABS plastic, sharp enough for self-defense, and completely undetectable by metal detectors. The brush end is fully functional. Available in Black, Pink, or Purple.

Hair Brush Knife Features and Specs

• 4.25-inch ABS plastic blade: Sharp, hard plastic — not metal, passes through metal detectors
• Fully functional brush: Works as a real hair brush — no visible indication of the blade
• Pull-apart deployment: Separate the handle from the brush head to reveal the blade
• Window breaker / skull crusher: Reinforced tip on the handle end for emergency use
• Hard ABS plastic construction: Durable and lightweight throughout
• Overall length: 6.25 inches
• Colors: Black, Pink, Purple

The plastic blade is what makes this product unique in the disguised knife category. Metal detector environments — clubs, certain venues, some buildings — where a metal blade would be confiscated or prohibited are exactly where this tool was designed for. The brush disguise holds up to casual inspection in a purse or bag.

Is the plastic blade actually effective for self-defense?

Hard ABS plastic can cause significant injury — it is described by the manufacturer as super sharp and capable of dealing serious damage. It is not as durable as a steel blade and would not hold up to heavy cutting tasks, but for close-quarters self-defense where the element of surprise is the primary advantage, a plastic blade is adequate. The window breaker tip on the handle adds a secondary impact option. Think of it as a last-resort tool for situations where no metal weapon is accessible or permitted.

Can you take a hair brush knife on a plane?

No. TSA prohibits all knives in carry-on baggage regardless of blade material — plastic blades are not exempt from the rule. While the plastic blade would not trigger a metal detector, TSA security uses both metal detectors and X-ray screening, and the blade profile is visible on X-ray. If discovered it would be confiscated. This product can be packed in checked luggage where knives are permitted. Always verify current TSA regulations before traveling.

Are hair brush knives legal to carry?

In many jurisdictions, yes — the plastic blade and brush disguise put this in a different legal category than a conventional knife. Many venues and jurisdictions that prohibit metal knives have no specific prohibition on plastic bladed items. That said, concealed weapon laws vary significantly by state and municipality. Always verify your local laws before carrying. When in doubt, check with your local law enforcement or an attorney.