Impossible Wrist Chopper

An audience member or two are invited to inspect the fine hard wood stocks and metal blade. Magician then demonstrates how the blade fits into the stocks. The blade is then lifted up so the volunteer(s) can place their hands through the holes in the wooden stocks, below the blade. Their wrists are then handcuffed together, locking them into the stocks. The blade is then pushed down into the stocks. Passing through the volunteers wrists without harm. The wooden stocks are then dismantled, showing each part. The spectators wrists are seen to be locked inside the holes of the blade. And the handcuffs are still locked around their wrists- Making this utterly IMPOSSIBLE!