It is made by hand with an alloy of 7 metals, symbolizing each one a planet: gold (Sun), silver (Moon), mercury (Mercury), iron (Mars), lead (Saturn), tin (Jupiter) and copper (Venus) . Its thick walls produce sounds of extraordinary duration. It also vibrates when the mallet slides around the outer top edge by varying the pressure or speed.

It is handcrafted with an alloy of 7 metals, each symbolizing a planet: gold (Sun), silver (Moon), mercury (Mercury), iron (Mars), lead (Saturn), tin (Jupiter) and copper (Venus) . Its thick walls produce sounds of extraordinary duration. It also vibrates when the mallet slides around the upper outer edge by varying the pressure or speed.