Buy this item and earn 180 reward points.
Magician passes for inspection a solid block of brass with a hole in the center large enough for a 5/8" steel ball pass through, a steel ball, a bolt and nut.
The bolt is pushed thru another hole in the block, and locked on with the nut. Blocking the large hole. No one can push the ball thru.
But one pass of the Magician's hand and the ball melts thru the bolt and out the other side!