An examined safety pin is made to shrink to a small fraction of its original size, and then stretched back to normal. It can then be handed over for examination.
We supply you two safety pins (made in stainless steel, and plated brass for this effect) and a special gimmick to create the illusion of the Shrinking Pin. Easy to do, and a very effective item you can carry in your pocket, ready to use any time any place.
Supplied with illustrated instructions.