If you like quality brass magic then you'll love the Rattle Bars. A small brass cylinder is inserted into one of the tubes causing it to rattle when shaken. The spectator is given every opportunity to find the only tube that rattles but it can't be done! Magician has complete control. The tube that rattles is whereever the magician wants it to be. Everything is totally self-contained. Nothing is switched, added, or palmed.