Grumble Glim by Nathan Kranzo

The Glim. A tool used by Magicuians and gamblers for 600 years to date.

A secret gamblers and magicians tool that has stood the test of time. A sacred item.  

Now thanks to Nathan Kranzos excellent thinking the Glim can be used safely in plain sight. Never suspected. Never detected. Always reliable and in your control. Completely under your control at any time you can gain knowledge of any card in the deck. Just think of the possibilities. It can also be utilised by mentalists for glimpsing words and/or pictures drawn by people.