A very popular, clever trick- the spectators always expect the magic to go wrong. On the first pass, the blade is shown cutting right past the large hole in the chopper, and even slicing a cigarette or a paper straw placed through the small bottom hole. On the second pass, the spectator puts his finger through the large hole- and the blade passes harmlessly through the finger! This model of the Finger Chopper has a unique locking mechanism and is examinable. Supplied ready to work, with instructions. This one is incredible! So very easy and yet a real jaw-dropper!