The magician shows a "gem stick." He demonstrates that it has six different colored diamonds embedded on each side of the stick. One of colors is chosen. Suddenly all the gems change to that chosen color, on both sides! Then one side turns back into the six varied colors and the stick can then be thoroughly examined. This is one of the most beautiful models of the Hot Rod trick ever created. It is polished chrome plated steel with large gems that can easily be seen. It is a square stick and the paddle move is easy to do. It is a professional model in every respect. Recommended. 01MM1317HOTRODMETAL