The red-back Bicycle Shim card has a .002” steel shim inserted beneath the face of the Four of Diamonds.  It costs more than a court shim card due to the additional procedure required to render the shim invisible.   The Shim card will adhere to any magnetic source and it will hold a light magnetic object, such as a quarter.
 
Robert Lamar commissioned me to create this card, which is featured in his one-man show, The Gift, in Nova Scotia.   
 
https://experiencethegift.ca/ 
 
"Wow!  Brilliant work, Tom.  You did an incredible job. It looks and feels beautiful.  You far exceeded my expectations."