Editorial Product Review:Item Description:Made of aluminum alloy. Ideal defense for all, no martial arts background needed. Easy to control, capable of bringing down an attacker. 5-1/2 inches long.
Buyer Reviews
Average Buyer Rating:

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Kubotan = satisfied
I purchased a silver Kubotan to act as my key chain for my work keys (I wanted something large - so I wouldn't lose it and something that could be used for self-defense - should the need arise; my home keys are on an large carabiner that double as a set of brass knuckles). Fortunately I have never used any key chains as weapons, but this functions well as a key chain. Solid, but doesn't weigh down my pocket and no so long as to be problematic.
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Good Product
Got this item for Christmas and seems pretty solid! Hopefully, it'll never have to be used in a serious situation, but just in case...
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Kubotan
Nifty tool. Nice and light, but very sturdy. Worth a buy if you want something for self defense that is nice and obscure. Don't try to take it on an airplane though. That's how I lost my first one.
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Aluminum vs. Wood
If you find yourself having to use your kubotan, chances are, it will be in a critical situation. Traditionally, kubotans are made out of a durable hardwood. However, I chose to get one made out of hardened aluminum for added reliability. Hardened aluminum will not break in the event that you have to use it to put pressure on someone's wrist. I think it's safe to say that the person's wrist bones would break before this little metal rod does.
A friend of mine, who studied martial arts, used to carry a wooden baton like this one. If he still carried them today, I am convinced that he would choose an aluminum one though.
MY FRIEND'S TIP:
Here's a tip from that old friend of mine. The keys themselves are a part of the weapon. And you can make them more effective, which will increase the damage from the baton. Take some keys that you no longer use. Any metal key would do, but try to find different sizes. About four of them would do. Take the keys to a grinder and sharpen the teeth of each key. Now, put the four keys in the keyring along with your regular keys. Face the sharp keys in opposite directions. Meaning two should face one way, but the other two should face in the opposite direction. The idea is that when you swing the baton like a flail, the sharpened keys would cut into the attacker's flesh. The keys are faced in opposite directions so that you can do major damage regardless of which direction that you are swinging.
CITAN'S EXPERIMENT:
Please keep in mind that you can also cut your hand. I tried this technique. I wore a pair of leather work gloves and swung against a wooden post. The sharpened keys bounced back and hit the back of my hand. Without the gloves, my hand would have gotten badly cut. For what it's worth, I swung against a large watermelon and the keys didn't bounce back though. I don't have anything else to add here, except maybe it might be good to swing against an attacker's fleshy parts to prevent the keys from rebounding. I'm not an expert though. But it was fun trying it on a watermelon.