2 different colored keys are thread on a shoe-lace by the spectator. Everything is EXAMINABLE. The spectator chooses between one of the colored keys. Only the very same chosen color key can escape from the shoe-lace though the spectator holds the ends from the beginning of the trick...
Everything can be examined from beginning to end!

Everything is included: 2 keys 2 colored caps Lace The gimmick Dowload instructions