Switch-Board by Dave Powell

The Dave Powell “Signature Clipboard” is an (Add a Number) that's like no other and more deceptive than any ever. It can switch anything written on a piece of paper to another message or text.

Effect: Three spectators each write down a 4 or 5 digit number and a fourth spectator makes the addition. This sum matches a prediction provided in a sealed envelope before the trick began.

The clipboard looks and handles just like a regular clipboard, even in the hands of the spectators. But, the board actually separates into two halves, and the paper is drawn into the inside via the ball chain. The board is made of black laminated Formica and is only an eighth of an inch thick. It can be taken apart and reset in less than a minute without any tools thanks to our unique interlocking dovetail system inside. It remains in a locked position when in the spectator’s hands. There's no chance of it changing the numbers prematurely. This clipboard has to be seen to be appreciated.