A miniature "guillotine" in clear plastic. The effect is simple but surely of high impact. 
 
Show how the chopper perfectly cuts anything you introduce in both its holes: a small carrot or sausage will be perfect. 
Now ask a spectator to introduce his forefinger. Bring the blade down quickly and of course the finger will be unharmed! It will look as if the blade has passed through the finger. 
 
• Comes supplied in a catchy and colorful box.
• This model of the Finger Chopper has a unique locking mechanism and is examinable, even by magicians familiar with the normal prop.