心灵魔术最大的一个功效就是可以预测未来，用最新的JAKS风格的军刀你就可以毫不费力的做到。

试想将一个包裹邮寄给那个雇佣你在两天后表演的人，并要求他们在表演那天带上这个包裹而且事先不要打开。

演出时，拿出一份当天的晨报，让某人去查当天的乐透号码和道琼斯指数，现在，要求把你邮寄的那个封着的包裹拿来，然后用那把刀子把它打开，让一个观众把手伸进包裹将那个预言抽出来，预言应验了。所有不可告人的事情那把刀子都做到了。

此道具包括一个带机关的刀和一个普通的刀子。

Billet Knife Jaks-Style by Joe Porper

One of the great feats of mentalism is the ability to predict the future. With this new Jaks-style Billet Knife that is just what you can do, with ease.

Imagine mailing a package to the person who hired you to perform two days in advance. Instruct them to bring the package with them the day of the performance and not to open it! Bring out the morning newspaper from the day of the performance. Have someone look up the lotto numbers and the DOW. Now, ask for the sealed package you sent, open the package with the knife and have a spectator reach inside and pull out the prediction. The prediction's MATCH!!!

The Knife does all the dirty work for you! You get a gimmicked knife and a regular knife.