If you live outside US, you may have difficulty to find some gimmicks. This video teaches you how to do your own karate coin. But, even if you have one karate coin, the second part of the video teaches how to use it (about 4 examples).
For me, the second example looks like what really magic would be :) !

Go and download it !!!

p.s.: As Penguin and the video said, you can harm yourself doing this kind of gimmick. But, again, even if you do not want to do this gimmick, download this for the second part of the video, where Christopher teaches you how to use a Karate Coin !

Very nice of Chris to release this as a free download! Lots of great info on how to make your own Karate Coin(s). Cool routine, too!

Thank you, Chris!!

The coin works well when you give it back as you do your walk around, then if they give your coin back repair the coin you can do a switch back. I found this to be very useful information. Taking the magic to a dojo to show the Sensi is great way to get added work and your name known Then leave the coin as advertisement with your business card. Thank you Chris

For those who have experience to construct is a piece of cake!
Very good explanation for those who don't have expirience!

Chris Wiehl is one of my favorite creators and performers. He knows what great magic should look like and his clever brain is always coming up with new and exciting effects.

Excellent seminar. In addition, learn how to make coins yourself. For those who demonstrate this trick, there is the opportunity to have many coins of different denominations. As they say, for all occasions. I highly recommend this trick.

Just a really great idea that is used now as a quick awesome effect.

a great way to create a karate coin,

I am able to make a Karate coin from the Yuan (Chinese currency), thank you for the explanation. Using the RMB karate coin in China is very much appreciated by the people.

I'm a little bothered by the description that came with it that states it was designed after there was a dissatisfaction over the authentic looks of other karate coins out there. It's well crafted, but perhaps a little over crafted. It LOOKS crafted. Others I've seen are uneven, there's obvious stress to the metal, etc.

It's beautifully made and the consistency is top notch. The hole is a perfect size and unlike other karate coins that are just punched, the edges are nice and smooth. A good buy if you want a gaffed coin that was made with attention to detail, albeit a bit overboard.