Demonstration effect : http://www.penguinmagic.com/p/4632

Signature cards connected to the borrowed ring or sunglasses.

Link a Borrowed Fingering or Sunglasses on a Signed Playing Card.

A Stand up effect!
Show your audience a secret Origami Move (not really) that you learned from your grandpa.
Fold a signed and un gimmicked Playing Card with a hole in one corner and a borrowed Finger ring behind your back.
After a few seconds behind your back you can show that the Finger ring is really Linked on the Signed Card!
You also can use Rubberbands, Borrowed Sunglasses etc.
After you remove the borrowed ring from the Card (again behind your back) you hand out all for examination! No Thread! No Magnets! No tears or Joins!
Including a non "forced" version where you can link two freely selected and signed Playing Cards on their punched holes together.
Link-and un link the cards and hand it out to the spectators. They can find nothing! No slits, nothing broken and nothing glued back together!
Build the Gimmick in under 3 minutes, put it in your pocket and you're ready to go!