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.