Loyalty by Paul Brook

Ask a participant to think of an image, a number and even a word and you are able to correctly determine exactly what they are thinking of. 

Additionally, you may want to pass on your mind reading abilities by giving another person the chance to guess the first participant's number and more often than not the second person will be able to:

100% accurate
Easy to do
Always with you
Nothing to replace
No reset required
Fits on your keys
100% examinable
Set includes: 

Three custom made loyalty key card fobs, link to a 45-page instructional eBook complete with full presentations and handlings and 29 full color photos. 

Bonus: 

There is also an instructional video where Paul Brook guides you through all of the different aspects of Loyalty and how you can start amazing people with these wonderful props. 

In the PDF instructions Paul also shares some additional ideas that enable the mentalist or magician to use a random participant's actual ungimmicked keys as part of the routine.